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RA28midge
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22R ECU on 18RG (I have no idea) Tue, 30 September 2003 01:20 Go to next message
Wired up the ECU yesterday (was from an auto RA65). The car won't start.
I have got the Engine loom from the RA65 going to injectors, TPS, resistor, AFM... but not to the coil.

I have wired up a constant power (black from ECU)
an engine on power (Black w/ yellow stripe).
an engine cranking/starter (black w/ white stripe)

the first two are taken from the fuse box (under dash)
The crank is taken from a plug coming off the starter.

What am I missing? where else does the computer get power from? or what other info does it need to run from the cabin loom?

how is the computer supposed to sense the RPM of the car (I am guessing from coil but I still have points dizzy and standard coil) I don't know which wires are supposed to go between coil/ECU. SO far I am just working with the Haynes manual with the RA65 wiring diagram in the back.
Norbie said to run the ign circuit from the -ve terminal of the coil but why not run it from the ignition?

[Updated on: Tue, 30 September 2003 01:23]

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Norbie
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 01:57 Go to previous messageGo to next message
You must run the IGN circuit to the -ve terminal of the coil; this is where the ECU gets its RPM signal from. The engine won't start without it!
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 02:01 Go to previous messageGo to next message
But on the wiring diagram for the 22R ECU on the haynes manual it has separate ign and coil circuits. So I should run the Black and Yellow stripe one to the -ve.

Norbie, I am counting on you here, you are my last hope. Razz before having to pay someone to have a look at it.

Are there any other power sources etc that I will need?

[Updated on: Tue, 30 September 2003 02:03]

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Norbie
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 02:09 Go to previous messageGo to next message
Are you using the early or late 22R-E ECU? I've only played with an 18R-GEU ECU and it has an IGN pin, but it has nothing about the coil. Have you actually looked at the codes on the circuit board or are you relying on your (probably inaccurate) manual?

The ECU also needs its own power source, which is the +B pin from memory. You should hook this up to the ignition (not the coil!) via a fuse and relay. Also make sure you have a really good ground - this gave me all sorts of grief when I wired mine up.
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 02:30 Go to previous messageGo to next message
I think I must have the later ECU.

What codes on the circuit board? it has a couple of stickers on the front of the box, saying 12pin and 6pin or something. I am just going on the post 82 wiring diagram in the back of the green RWD celica manual.

Is it earthed through the bracket that attaches it to the car? I have all the brown wires for the injector earths etc bolted to the manifold where they come off the loom.

The power is running from the constant power from the fuse box in the cabin, which I figure is coming through the main relay and fuses so it should be okay (???).
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 03:25 Go to previous messageGo to next message
Make sure you are getting fuel. Move the vain on the air flow meter with the ignition on, the pump should kick in? Next do as norbie says and get youself a ign signal. Once you have the IGN hooked up list for injectors firing when cranking or take a lead of one of the injectors and put a test pope on it ( No not the type you get a auto barn for $2 use an LED and a resitor 780 ohms or so) and check it is pulsing.
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 04:56 Go to previous messageGo to next message
fuel isn't a problem.
is there pin labelling on the inside of the case or on the outside?
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Norbie
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 05:26 Go to previous messageGo to next message
On my 18R-GEU ECU, the pins were labelled on the circuit board (inside the case obviously). Same for the 5M-E from memory.
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 05:50 Go to previous messageGo to next message
Are your pin out any thing like this? If so IG is the one you need.

http://www.geocities.com/MotorCity/Pit/9975/engine pix/drawings/ToyEFI_Pins_22R-E.gif
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 06:24 Go to previous messageGo to next message
I thought I had seen something like these before but couldn't remember when to find them.

Thanks heaps roger.

I will head home now and check it out, but i think that it is right. All the TCCS computers seem to have crank angle sensors and 3 plugs, I only have 2 plugs so it should be the standard old 22RE ECU.

I will let you know how I go.
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 07:54 Go to previous messageGo to next message
It seems the haynes manual is completely different with its wiring colours. anyway Rolling Eyes .
The ECU has the same pin configuration as the one in the pic.

What is the NSW pin/idle control valve, and where does it go?

Where does the STA pin go? is it to the starter motor plug?

From the looks of the pin diagram versus the 2TG etc it should be quite similar to the 18RG one, so if people can tell me what pins they wired to where I would be appreciative.

Sorry, I feel like I need someone to hold my hand while I am doing this.
I now have BAT to constant power and +B to the engine on power.

The battery is now going flat, typical.
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Norbie
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 12:36 Go to previous messageGo to next message
The 2T-GEU ECU is pretty much identical to the 18R-GEU ECU. The connector plugs may be different but they have the same pins.

I don't think my ECU has a NSW pin, but the STA pin is meant to have +12v when you turn the key to start the engine. Basically it lets the ECU know you're trying to start the engine.
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THE WITZL
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 21:36 Go to previous messageGo to next message
you really should also be using electronic ignition, and not points (performance increase is also HUGE over points!)

If you need an elec. dizzy, coil + ignitor gimme a PM and ill sort something out with you Smile

NB: ALL toyota ECU's have the pins labelled on the ECU circuit board. Everything from an AE101 4A-GZE to 2S-E to 22R-E to 4A-GE.... And the abbreviations are all the same too.

From memory, NSW = Neutral Start Switch.
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 30 September 2003 23:36 Go to previous messageGo to next message
STA is essentially the signal that goes to the starter motor solonoid. There are two ways to activate the fuel pump. Ie movement of the air flow meter flap and when cranking( because the air flow meter flap probably won't move enough).

NSW Probaly goes to the the air bypass valave or something. Most likely not necessary to get the engine running at least. The efi will work without electronic dizzy but as witzle says it is a great upgrade.
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Steve M
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 02:40 Go to previous messageGo to next message
if NSW is "neutral start switch", then this MUST be done correctly. This is the part which means that an auto camira can't be started while in gear. I reckon this could be part of the problem Andrew.

Witzl, do you reckon electronic ignition would give a consistent spark?
Our points dizzy fires cylinder four at about 5deg. and cylinder 1 at about 1deg.

Has anyone else found this issue?
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roger
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 03:43 Go to previous messageGo to next message
I think SteveM may be right. If this is the case you will most likely need to short this to earth to fire the injectors.
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sideshow
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 04:52 Go to previous messageGo to next message
nsw does jack shit on toyotas

its neutral start switch
on a manual car i think i recieves a start signal

try this
on the ecu there should be a pin call ig or ig-

turn on ignition

tap this wire to an earth very quickly on and off
this will simulate and rpm signal pulse to the ecu

yr injectors should now pulse or tick

make sure yr injectors arent blocked

another way to try this is to connect a points dizzy to the ig- or ig pin and spin the dizzy

this will give the signal to the ecu to pulse injectors

to get the coil to spark this ig or ig- should be connected to the neg side of the coil
and u should have 12 v to pos side of coil

if this works with the points dizzy and not with the elcectronic dizzy then u mihgt have a bad missmatch between dizzy coil and ignitor
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 09:13 Go to previous messageGo to next message
Checking through a few of the pin diagrams, and taking off the cover, my computer has the same setup as the 2S-E ECU listed on that enginepix page. I think the 2S-E and 22R-E ecu's are identical depending on whether they are auto or manual, that 2S-E diagram is for an auto by my guess.

So should I try to get hold of a manual computer instead?

Norbie, where have you run your power and starter signals from? (or anyone else for that matter)

I will hook NSW up to the same source as the starter signal. failing that I will earth it.

My fuel pump is not run from the computer, I have a separate fuel cutoff switch being run from the coil and the ignition switch.
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sideshow
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 09:59 Go to previous messageGo to next message
do not hook nsw upo to earth
just leave it unplugged

i have a 22re wiring diagram here on one iof my software from repco

it has now nsw switch
i dont hook them up and never get any probs

make sure u r gettin a pulse to the computer

get a correct diagram pin A10 has the signal from the negative coil goin to it

that means the signal from the dizzy goes to the negative coil
too
without this yr car will not spark of get injectors clicking

the auto computer should be fine

back then the computers werent smart enough so half the shit might not be needed

these are very easy to hook up
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sideshow
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 10:03 Go to previous messageGo to next message
i usually open the loom up

i connect all the wires which need ignition to one wire
which is to +b +b1 power to circuit opening relay

then i run all the wires thaT NEED START TO ONE WIRE
these are start to ecu and start to cold start injector

then i run the airflow meter wire to trigger the fuel pump
and the start wire to the circuit opening relay


then i run power to the injectors

and then the dizzy and coil wiring

this is most of all u need to get it running half desent
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Norbie
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Re: 22R ECU on 18RG (I have no idea) Wed, 01 October 2003 12:09 Go to previous messageGo to next message
RA28midge wrote on Wed, 01 October 2003 19:13

Norbie, where have you run your power and starter signals from? (or anyone else for that matter)

From memory I'm getting power from the ignition coil and starter from the actual starter solenoid. It's been a while since I wired it up though, at least 5 years I think!
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wil8115
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icon14.gif  Re: 22R ECU on 18RG (I have no idea) Thu, 02 October 2003 05:39 Go to previous messageGo to next message
If your ECU controls timing its alot harder.(digital)
If it doesn't you can get it to work.(analog)

You'll need the injectors, AFM, ECU, Coil, ignitor etc all from the same setup at first.

Depending on what your installing this into you'll basically have to wire up your own harness.
It's not that hard actually.
That Gif from Matti's site is a big help.
But it doesn't show the wiring diagrams for the relays etc.
I have several BGB(big green books) that show everything BUT they are in Melourne and i'm in Seattle for a bit longer.
My friend might let me borrow his and make some scans.
after the harness for the engine there is only about 6 wires that need to be ran.
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Fri, 03 October 2003 02:58 Go to previous messageGo to next message
Still no luck,
I have the loom, injectors and AFM off the same 22RE that the computer is off.

I don't think the injectors are firing, I am guessing there should be a distinctive sound coming from them, which there is not.

I have the STA pin hooked up to the little plug on the starter. and IG to -ve side of coil.
The computer clicks when I turn the ignition on but the engine just keeps cranking without firing.
Electronic IG might be required for the 22RE computer, maybe 18RG ECU's are okay with points not the 22R.

I will just have to wait for Karl to see if the ignitor helps.
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wil8115
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Re: 22R ECU on 18RG (I have no idea) Sat, 04 October 2003 08:37 Go to previous messageGo to next message
I've just always used the 22RE coil and ignitor.
make sure that everything that needs 12+v has 12+v.
I seem to recall that there are 4 wires that need it. 1 constant, and 3 switched.
also the ECU needs the signal from the Dizzy in order to fire the injectors. dizzy - ignitor - ECU - injcetors
What type of Dizzy/Ig/Coil are you using now?
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sideshow
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Re: 22R ECU on 18RG (I have no idea) Sat, 04 October 2003 08:44 Go to previous messageGo to next message
ok do u have 12 volts power to the injectors
get a noid light and check if the injectors are pusling

these ecus are so basic

check for power to b and b+ at ecu

check for power to injectors

power to coil

and earths then it should run if u have rpm signal

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roger
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Re: 22R ECU on 18RG (I have no idea) Mon, 06 October 2003 01:04 Go to previous messageGo to next message
I thought I posted this the other day. But obviously not. If your system is from an auto the NSW may not be earthed ie leads to the nuetral/park switch on the manual systems this will be earthed within the loom and you would not have to worry about it as Side show suggests. Check that NSW is earthed by probing the ecu pin out and an earth point.

As side show suggest check you have power to the injectors and probe them with an led and resistor to check for pulse.

What impedence are your injectors? the 22re uses low impedence I think. Therfore ballast resitors must be wired in. Do you have ballast resistors. If your injectors are high impedence then make sure you remove the ballast resisotors. Check you wiring go through the earths and the power circuits make sure your relays are in and wired correctly.

Roger
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Mon, 06 October 2003 07:28 Go to previous messageGo to next message
Okay this is the wiring I have, I even went and bought a multimeter yesterday so I can check everything.
Ig to -ve coil, is receiving signal fine
STA is at the starter plug- receiving signal fine
BAT has constant power (12.35V)
+B has power when ignition is at on (10.5V)
N/S is earthed with .9 ohm resistance

There was no power being supplied to the injectors when I was cranking the engine.
The injectors have a resistance of 2.9.

I thought everything else was for accessories or already hooked up.

There is a thick wire that is black with a red stripe hanging from where I cut the loom. Is this supposed to have power?
http://users.chariot.net.au/~andromi/images/wire.JPG
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roger
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Re: 22R ECU on 18RG (I have no idea) Mon, 06 October 2003 07:52 Go to previous messageGo to next message
Off the top of my head is it a power wire for the air flow meter. Has you multimeter got a continutiy cheker that beeps? Start goinging through the wiring diagram wire by wire and see if the conection is right. Go through the Pinout and make sure things are connect to the right thing. I think the black and red should be ignition +ve may be injector or air flow meter.

Actually looking at a few similar diagrams I am pretty sure Black and red usally feeds ignition power to computer, injectors, coil. With out this feed you will not get power to the injectors which may be half you problem. If I am thinking of the right wire? you need to confirm with a diagram. Just probe that wire and the injector plugs for contiunity if you get a beep it needs power.

[Updated on: Mon, 06 October 2003 07:57]

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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Mon, 06 October 2003 09:45 Go to previous messageGo to next message
Yes you are right that is the power supply to the injectors. I think it might be necessary Embarassed . Wired it up and it coughs and splutters now, for about 5 seconds then dies. I thought the injectors were powered through the computer (carbies are so much easier to understand).

What would be making it switch off after a few seconds? are there any other wires on that plug that need to be wired up- I have now wired up a black to the starter motor for the cold start injector. if the AFM isn't getting power would the computer turn off?
It is also backfiring heaps, I know my timing is way out, hopefully this is the only problem, am I likely to damage the AFM?
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roger
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Re: 22R ECU on 18RG (I have no idea) Mon, 06 October 2003 22:32 Go to previous messageGo to next message
Possible you fuel pump is cutting out due to the wiring on the air flow meter. with the ignition on push the flap on the air flow meter and check that the pump is running? If it isn't check that the air flow meter wiring is correct and the open circuit relay is wired correctly.

You are unlikely to damage the air flow meter it is fairly primative stuff. Yes no power to the air flow meter could be the problem ie not sending appropriate signal to open circuit relay and switching pump on.

If it is back firing sound like your timing is out. Set this up by eye first. Engine on top dead centre. Firing on piston one and line the dizzy up to the no1 plug on the dizzy cap.

[Updated on: Tue, 07 October 2003 02:01]

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Norbie
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 00:40 Go to previous messageGo to next message
If it runs for a few seconds then dies, that probably means the injectors aren't pulsing but the engine starts because the cold start injector (CSI) is opening. After a few seconds the CSI shuts off then you have no fuel and the engine stops. I've seen this happen a few times so I suspect that's what's going on!

You really need to get a test light on those injectors and see if they're actually working. Another trick I used to use was to remove the distributor and turn it by hand - that way you can fire the coil without having to turn the engine over, and if the EFI is wired up properly you should be able to hear the injectors clicking at the same time.
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 02:30 Go to previous messageGo to next message
Well it is definitely getting some fuel because I blew the AFM off twice this morning. Shocked New undies required.
The injectors are getting a signal. I measured the voltage going across the plug and it was getting a "pulse".

I still can't hear a clicking though. I will give your trick a try this arvo Norbie.

I took number 1 spark plug out and it was wet with fuel, more than what I would expect from just the cold start. but I am too scared to crank it again.

The least likely point for backfiring to occur would be 0° BTDC (or TDC) right? or at a beyond TDC point?
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 02:42 Go to previous messageGo to next message
sounds like your timing could be 180deg out.

There are two circuits on the open circuit relay one for when you are cranking one for when the engine is running. These activate the fuel pump. Yes you are getting fuel. But are you only getting fuel when cranking? push the vane on the air flow meter to check that the fuel pump is running when you stop cranking.

By the sounds of it you injectors are pulsing this is good. Sounds like your timing is out but check the fuel pump situation as discribed other wise the pump could be stopping as soon as you stop cranking. But I still imagine it would run for 10-20 sec or so if it wasn't

[Updated on: Tue, 07 October 2003 02:47]

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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 02:47 Go to previous messageGo to next message
The fuel pump is completely seperate/ not controlled by the computer, it is wired up using a seperate shutoff valve that detects when there is no ignition spark anymore. I had my electric pump for the carbie wired up to it so I thought since it was wired up I might as well use it for the EFI pump rather than stuffing around with the computer.

How do I tell if it is out 180°? I only put the head back on last week.
I checked this morning and number 1 is at the top and the rotor is at the 10/11 o'clock position.

[Updated on: Tue, 07 October 2003 02:50]

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wil8115
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 03:01 Go to previous messageGo to next message
Where does it go?
There are atleast 3 wires that go into the ECU that need switch 12+. And the BATT has constant 12+.
Make sure that that injector resister has 12+ on one side.
Do you have a noid light?
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 03:13 Go to previous messageGo to next message
The black/red wire goes into the loom, so do 6 other wires that are also unaccounted for.
3 powers on the 18pin plug? I have 1 (2 if you count the start pin)
What I have wired up is listed above, There are 5 loose wires coming out of the 18P ECU plug that I figure aren't essential (speed sensor, A/C, EGR...).
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 03:51 Go to previous messageGo to next message
if number 1 is at the top(12oclock) and the rotor is pointing to to 10/11 oclock fix this and try again. if it is still backfiring try below.


How do you tell if it 180 degress out?

Check the position of the cams

or

swap the plugs on the dizzy cap around and try and start

ie if your configuration is

1 4
3 2

swap 1&2 and 3&4

this is assumeing you put the dizzy in at top dead centre and had the rotor pointing at number 1 plug

[Updated on: Tue, 07 October 2003 03:57]

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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 03:56 Go to previous messageGo to next message
No my firing order is fine.

I will just disconnect the coldstart plug and see what happens then, if it still fires that will eliminate one set of possibilities.
I am getting sick of swapping batteries around!
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 04:02 Go to previous messageGo to next message
I am not changeing your firing order here you may notice that

1 3 ie firing order 1324
4 2

is the same firing order

2 4
3 1 ie 1324

but is 180 degress around the distributor

not sure what the firing order is and I am not suggesting you change it. Just phasing the distributor 180 dgrees

this is due to the fact that when you put the dizzy in you probably didn't know which stroke you put it in on ie firing or intake? it will back fire like buggering if you set the dizzy up on intake stroke. 180 degress will give you the firing stroke which is why you swap the leads around or remove the dizzy and make sure it is on the firing stroke.

[Updated on: Tue, 07 October 2003 04:02]

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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 04:07 Go to previous messageGo to next message
now I get what you are saying. The firing order is 1342, hence my confusion.
The car was running fineish on carbs and I haven't taken the dizzy out since then, it is just the timing has been adjusted since, so it shouldn't be that far out.

if I spent as much time on my thesis as I do stuffing around with this car....
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roger
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 04:13 Go to previous messageGo to next message
If you have just put the head on I would retime the thing from scratch.

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wil8115
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 05:57 Go to previous messageGo to next message
The nice thing about the factory manuals is that it has the specs for the pin outs from the ECU. I'll see if i can get you the scans asap. i can assure you it wont run without those 3 wires having 12+. BTDT Wink
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 06:41 Go to previous messageGo to next message
I had put all the leads on the distributer 1 place further on than they should have been. silly boy. Embarassed .

It now runs, doesn't blow anything up, but dies unless I sit there poking on the AFM flap gently. The initial idle is fine, I guess in the cold start phase, but then when it relaxes it fades out. I unplugged the coldstart injector and it would still run for 10secs or so, so I am confident that it isn't only running on the coldstart fuel supply.
When I open up the throttle it dies straight away too. I am guessing that it is running too lean???? How do you increase fuel for EFI? big screw on top of throttle body?
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Norbie
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 11:59 Go to previous messageGo to next message
Yep, sounds like it's running too lean. That usually happens because of a big air leak, so investigate that thoroughly before you screw with the AFM.
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Lambolica
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 23:26 Go to previous messageGo to next message
I agree with Norbie, You can have the car wired perfectly but if there is an air leak in the intake pipe you'll get the back fire out of the AFM and bad erratic idle and stalling after thae car starts. This gave me all sorts of headaches unitl someone gave me the answer. Norbie, midge thanks Very Happy

On the subject I just finished prewiring my 18R-GEU and ECU,
My Dizzy is electronic and runs to an igniter and the IG signal comes from the Igniter, Would this have been the standard setup of has a previous owner upgraded the dizzy?
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THE WITZL
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Re: 22R ECU on 18RG (I have no idea) Tue, 07 October 2003 23:33 Go to previous messageGo to next message
the standard setup was indeed electronic ignition with an ignitor.

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Lambolica
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 00:49 Go to previous messageGo to next message
Thanks. The manuals I have show about 3 different setups non of which resemble what is in my car. Rolling Eyes

But It's running Evil or Very Mad
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 03:30 Go to previous messageGo to next message
If I rotate the TPS so that it thinks that the throttle is open more than it actually is would it richen the mixture? By my reckoning it should.
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Norbie
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 04:42 Go to previous messageGo to next message
No. The TPS is actually a 3-position switch and it has no direct influence on fuel mixtures.
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sideshow
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 07:51 Go to previous messageGo to next message
the tps can alter mixtures but not much
it does play round with timing too

if its a bariable type u have to set it so its about 0.5 volts at closed position and it should goto about 4 volts at fully open

i have come across cars with the timing doing funny things if the throttle aint set right
this was on a 4age

what fuel pressure have u got

if the engine dies as soon as u rev it
it is either the airflow signal to the ecu
or fuk all fuel pressure

make sure u have an efi pump not like this car i wired up awhile ago
didnt know efi needed different pump to a carby car heheh

if u have minor air leaks im pretty sure it wount run tooo lean
it should be enough to rev abit as the air flow will open slightly

but if the engine dies its usually something basic
either airflow wiring or meter
or fuel pressure
remove the return line and see if u r gettin good fuel out of it

[Updated on: Wed, 08 October 2003 07:56]

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THE WITZL
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 08:30 Go to previous messageGo to next message
i think u will find that the 18R-GEU TPS isn't one of the lovely variable ones like on a 4A-GE. Its a 3-position crudder, signalling idle, off-idle and open throttle.

I'm on the lookout for one of the lovely fully variable 22R-E ones from a TCCS 22R-E.
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Norbie
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 09:01 Go to previous messageGo to next message
Karl is correct, like I said it's a 3-position switch on an 18R-GEU. Some 22R-E's have a potentiometer type TPS, but I was under the impression this was only used for the auto transmission, not the EFI system. Could be wrong though.
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sideshow
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 09:01 Go to previous messageGo to next message
ok

then u have to make sure the idle contacts have continuity when throttle is shut
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oldcorollas
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 10:23 Go to previous messageGo to next message
Heya Witzl,
i have me a 22RE TB with the 4 pin TPS... after seeign that Wolf one, i'm thinking of going with that (since it's smaller etc)..

you wouldn't happen to have a 50mm TB would you??
Cya, Stewart

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roger
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 22:41 Go to previous messageGo to next message
witzel,

if you go the tccs system be carefull. The adjustability of this system to other engine may be suspect. Being a digital system it will use maps unlike the l jet gear. However if it still has a vane style air flow meter then some adjustability will be retained. However you are still reading from a map so at best you are only offsetting the map reading. Unless you plan to reprogram the rom I would stick to the ljet gear or mega squirt for a cheap and capable system

[Updated on: Wed, 08 October 2003 22:58]

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Steve M
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 23:34 Go to previous messageGo to next message
How is the mixture adjusted with an EFI set up, is it all computer tampering or is there a screw somewhere?
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roger
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Re: 22R ECU on 18RG (I have no idea) Wed, 08 October 2003 23:46 Go to previous messageGo to next message
In an L jet setup the mixture can be adjusted in the flowwing ways.

Change the spring tension of the air flow meter tap.

Adjust the air by pass screw on the air flow meter.

fool the computer that it is running colder than it is by adjusting the resitance of the engine coolent sensor.

Adjsutable fuel regulator

different injectors.

A more complex way of doin it is to change the resistor array in the air flow meter with appropriately sized potentiometers to give finer adjust ment at different air flows ( not for the faint hearted )

in a TCCS system it would be more complex. you essentially need to hack the code in the rom dissasemble to work out wher the tables are and then start burning roms. I am not even sure this is possible with the TCCS system as I don't know if it has external or microprocessor internal rom.
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THE WITZL
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Re: 22R ECU on 18RG (I have no idea) Thu, 09 October 2003 00:43 Go to previous messageGo to next message
im very aware of the incompatibility of TCCS fuel control systems from difering motors, which is why i wont be using them. I have other plans.
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wil8115
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Re: 22R ECU on 18RG (I have no idea) Fri, 10 October 2003 05:51 Go to previous messageGo to next message
THE WITZL wrote on Wed, 08 October 2003 18:30

i think u will find that the 18R-GEU TPS isn't one of the lovely variable ones like on a 4A-GE. Its a 3-position crudder, signalling idle, off-idle and open throttle.

I'm on the lookout for one of the lovely fully variable 22R-E ones from a TCCS 22R-E.


How many do you want? Wink
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RA28midge
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Re: 22R ECU on 18RG (I have no idea) Sat, 11 October 2003 02:00 Go to previous message
it still won't run for more than a few seconds, it will rev for a bit but then it will just die.
Any further ideas as to what would cause this? electronics would be my guess...
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