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Location:
Melbourne
Registered:
March 2003
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1g cutting out at 4000rpm
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Sun, 10 October 2004 10:16
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I recently put in a replacement engine. Planning on going to a big single turbo, i put cleaned flow tested 440cc from a 7m in. Now I have hardly driven it apart from getting it rwc and to Vic roads. It would always cut out at 3500-4000rpm under heavy acceleration which I put down to the injectors overfuelling it.
So i installed a safc and turned every dial to -30% to bring the injector flow down to 308cc as a rough guide. Then changed the plugs to ngk BCPR5EY GAPPED TO .7MM. Set the timing to 10deg and changed the oil and filter. Planning to run higher boost as soon as i fit a recirc bov. The car is more responsive now but still cuts out at 4000rpm.
I tried the fuel pump short fp to b+ , no difference.
I have played with the afm connection as it looked to have some overspray in it, sanded it clean for contact.
Running out of ideas to check.
Is the AFM rooted?
the 02 Sensor?
Its a manual conversion with a manual ecu. Auto trans ecu removed.
How do you read the diagnostic port? I have searched but no answers yet.
Thanks in advance
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 01:24
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For diagnostics I think you ground the "T" terminal in the diagnostic connector thingo.
When you turn on the ignition, the check engine light will flash a code, for instance 2 flashes, a pause, then 4 flashes is the code 24... look that up (in the gallery/repository on this site) and you'll have a clue as to what is broken.
Good luck!
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Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 01:57
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nah, you don't ground a terminal, there are 2 terminals in the diagnostic connector you have to bridge I can't find a pic to show you at the moment, I'll dig one up if no-one else can help you.
in the towmods tech docs section is a .DOC file with the codes.
Tim.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 02:09
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It's T and E1 or something like that.
My brain is fried because i'm putting up with the noise of kids screaming and shouting while they throw a ball around a tiny hall.
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 06:45
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When i short over T and E1 it makes the engine light flash continuosly.
What does that mean.
The doc in tech docs section lists all the codes, but not what the flashes mean. It only has number listings there so i am still lost. Do i have to have a toyota diag tool?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 06:56
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Constant flashing is everythings OK, diagnostics wise.
I doubt it would be overfuelling, it would take a lot of fuel to stop a motor doing 4k rpm, with boost.
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 07:20
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Thanks, thats good to know.
I wonder if its the afm sticking or malfunctioning. The previous owner managed to get overspray inside it which i have nearly removed all of.
Is the 7mge afm interchangeable/upgrade to compensate for the larger injectors?
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 07:28
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Ok , i just looked at the afm , it moves smoothly for the full rev range. Another theory out the window
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Location:
Sydney
Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 12:59
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Was the problem at 4000rpm there with stock injectors etc?
Is 4000rpm about where the 1GGTE goes from closed to open loop?
What are the load sensors on a 1GGTE - AFM and MAP or just AFM?
Have you checked AFM, MAP and TPS operation?
Where are all the 1GGTE gurus?
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 13:19
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They only have AFM and TPS. It shouldn't use closed loop at all under WOT.
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Location:
sydney
Registered:
March 2003
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 13:45
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The plan is to do all of thes things.
The injectors were put in when the engine was out, i am still waiting for my turbo to arrive..
Its a cheap job i know, i didn't say i was doing it properly. The SAFC is a stop gap measure for now.
Basically i have converted to manaul and put a new engine in, bought the maniflod for the single , the turbo, boost controller, FMIC and torsen LSD and now want to drive it instead of waiting forever.
Got it RWC and Reg and need to save some more money for management.
BTW the speedo works with the 20 pulse sender unit. thanks Sideshow
Can anyone confirm if this is the map
http://www.thesoarer.com/Default.aspx?tabid=572
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Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 13:51
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Well you're either loosing fuel or spark at 4K. Or the computer just spits and closes down all together. can you save the engine or does it stall everytime regardless?
Any way you can watch the spark when it dies? Pull out a plug, start it, rev it up and watch to see if it keeps sparking when the engine dies? (I don't know how good an idea this is...)
better idea...
Go buy one of those cheap-o spark plug tools. You can get em for like $3 at super cheap and places like that, you can place it on a lead and it'll tell you if it's firing. Hold it over the lead and then rev it up and get it to cut to check spark.
Tim.
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Mon, 11 October 2004 13:57
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Its only under heavy acceleration that it dies.
Under light accleration it goes to 5000rpm before it occurs. New plugs, leads tested as good, new dizzy cap, timing set yesterday.
I will be swapping the item in the link above tomorrow afternoon.
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Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Tue, 12 October 2004 01:35
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I have no idea what trhat thing in the link is but I don't think it's important, I never had on on my GEN3... 1GGTE's don't have MAP sensors, just AFM meters.
Are you able to stop the engine from stalling completely? Ir once you hit the cut point it just dies completely till you restart? Do you have to turn the ignition of and on before it starts?
Try to find out if the ECU cacks itself completely or one of the peripheral components are just shitting down. Like the igniter might be giving up under that much load. Or the fuel pump may stop for some reason.
Hook a test light up to your fuel pump circuit so you can tell when it shuts down. Also check the spark like I said before. Just hold one of those spark testers on a lead, rev the engine over 5K to get it to die and watch to see if it's still firing whilst the engine dies.
Tim
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Tue, 12 October 2004 09:16
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I swapped the thing in the link above, little to no difference.
When it surges it doesn't actually stall or die, you can maintain it jerking along at the same speed. Not very nice to drive though!
I will get the spark tested tomorrow. I put the multimeter on the leads and they seemed fine. Ihad a spare coil lead that read a little higher so i swapped that one over.
I will try the fuel pump short again tonight .... wishful thinking though.
Where is the igniter on these??? under the coil?
I appreciate your help on this guys. Its not my stongest area!!!
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Tue, 12 October 2004 11:31
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"chris, the 1g has a map sensor as well under the plenium, used only for boost, " as posted by CraigzEE
I believe that it is the unit shown in the link above, with the vaccuum cannister attached to it.
Not that it really matters because the newer one made no difference.
When i floor it in first the revs cut at about 3500rpm , in second its at 4000-4200rpm etc.
I can only keep swapping over bits till i find out what the gremlin is.
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Location:
sydney
Registered:
March 2003
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Tue, 12 October 2004 22:14
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Ok, thanks for those tips. I will attend to an exhaust leak near the 02 sensor. Then get it on the dyno to ascertain exactly whats going on.
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Location:
Newcastle, NSW, Australia
Registered:
May 2002
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Wed, 13 October 2004 09:39
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Yes the injectors are the same impedance.
I will put the original ones back in and see how i go.
Sounds like a Sunday job!
Thanks again guys!!
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Registered:
May 2002
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Re: 1g cutting out at 4000rpm
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Wed, 13 October 2004 11:11
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if it's cutting out due to overfuealing then you should be able to see the plumes of black smoke at idle....
Did you try the spark and fuel pump things I suggested? You gotta know what is actually cutting out. It isn't much good just blindly changing everything in a hope it works again.
If this shit isn't you main area of expertise, then just take it to a dyno. for 100 bucks or so they'll map your spark, A/F ratio and you'll get a HP readout as well 
Tim.
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Wed, 13 October 2004 14:38
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Fair call, i will try and get it to a dyno tomorrow. Would be nice to know the AFR.
No i haven't got that spark thingy yet. Keep running out of time.
On the bright side i am getting lots of little things sorted that otherwise wouldn't have happened!!
I doubt the overfuelling as well because the car runs so smoothly prior to the cut.
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Location:
Melbourne
Registered:
March 2003
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Re: 1g cutting out at 4000rpm
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Thu, 14 October 2004 11:03
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WELL F*CK ME!
It goes NOW!!!
Removed the SAFC.
Took the injectors out and put the dirty old originals back in.
SO now for all for the i TOLD YOU SO's.
I have told others they are mad when they put in big injectors, and then i did it myself.
Oh well a big thanks to all you guys for your input. Now onto the next job, replacing the clutch cylinder.
Cheers
Andrew
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1g cutting out at 4000rpm
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Thu, 14 October 2004 11:11
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sorry I didn't get to reply but I would have suggested the same thing
Just because I know how rich my old gz20 soarer ran with the stock injectors which I think are either 225cc or 245cc so obviously it is a pretty damn big jump to 440cc and even -30% on a SAFC couldn't handle that change I don't think.
Anyway, good to see it is going again! And don't put those injectors back in until you get the ECU! 
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