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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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I hope I didn't need that - 1jz component
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Mon, 07 July 2003 05:44
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I've been going to town on the weirting on my car (I got too many funny looks at the dyno day)
after pulling out one of the loose wires, I found it attached to something important. it's on the hydraulic engine fan/water pump line, it's a metal cylinder abouit 8cm long and 3cm wide, with a bolt in one end the two wires are attached to.
is it just some sort of pressure/level sensor? the car runs fine without it, so I assume it's not critical.
Also on the 1jz block, passenger side about 15cm below the TPS, there's a sensor. would I be correct in assuming this is a knock sensor?
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Location:
Cabramatta, NSW
Registered:
May 2002
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 Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 06:07
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Dude. You scare me.
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Location:
Sydney Australia
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 06:18
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dude i remember seeing this when i ripped my hydro setup out.. i think its a pressure sensor which works off the temperature... so when your motor heats up.. it releases something to tel the hydro to flow more and spin the fan faster.
Maybe i'm way off!! hehe
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 06:18
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ssshhh!
all I've done is cut all the wires that were no longer going to anything (since I pulled out the original ecu)
so I know that thing isn't sending it's signal anywhere.. it just looks important 
also, now that the stock ecu isn't in there, would I be correct in assuming the diagnostic terminals no longer serve any function?
'cause I've found a bunch of spliced wires that go to the diagnostic terminals, the ecu (which is now cut), and somewhere else (haven't explored that far).
as far as my (limited) logic tellsme, I sould be fine to simply remove the diagnostic terminals.
anyone see a problem with that?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 06:19
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that's quite possibly it... although even when it was connected to the stock ecu my fan didn't go into it's "fast" cycle.
ah well, bring on the thermos
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Location:
sydney
Registered:
March 2003
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 06:46
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theres alot of things to be hooked up if u r runnin the hydraulic fan
if u arent runnin factory ecu then u cant run hydraulic fan i think
the wires to the hydraulic fan solenoid are
white with red trace and cant remember other colour
but it has a grey 2 pin plug right hand front of engine
the hydraulic fan system has its own little ecu which tells it temperarture from radiaotr, when a/c is on, and few other things too
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 07:41
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I thought as much. Don't think that mini-ecu was installed when the conversion was done, making that a little useless.
hence I think I'll just go for a thermo or 2, with a simple temp sensor
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 09:02
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Does your Microtech have an 'aux out' that will control a thermo?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 09:13
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it has an aux-out
I haven't looked into using it to control a thermo
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 09:52
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Ah OK....I know very little about Microtechs but hopefully you will be able to set it up to turn on a thermo at a preset temp. Then you can do away with that pesky hydraulic fan.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 09:54
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yep
and ideally get a belt-driven water pump, although I've heard the setup for them is hard to justify (luke?), so I might just leave the water pump hydraulically powered
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Location:
Sydney Australia
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 11:08
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don't exactly know what u mean, but a soarer non hydro water pump is cheap as compared to a hydro set up and is easy to swap. Mines been great!!
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Location:
Brisbane
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Mon, 07 July 2003 23:04
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I paid $130 for a brand new non-hydraulic water pump (2JZ). I wasn't even going to try to make that hydro fan work!
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Tue, 08 July 2003 05:25
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but dont you need a new pullet on the engine or some such to run to the pump?
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Location:
Brisbane
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Tue, 08 July 2003 06:56
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Yes, you need the pulley for the non-hydro pump as it mounts to the pump differently.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Tue, 08 July 2003 07:27
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and that costs like $100+ as well doesn't it?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Tue, 08 July 2003 08:40
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well.
pulled out all but a few of the wires this afternoon (for those who saw my engine bay, you'll understand it took all afternoon)
all these weird diagnostics and plugs that weren't being used ended up just dead end wires, so my engine bay look a lot neater now
got a 1jz igniter for sale now too 
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 05:25
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as was to be expected, I've pulled out something I needed.
somewhere along the line the heater has stopped working (which was annoying to find out at 5:30am this morning).
either something's come loose with all the jiggling I did, or I might have snipped something I shouldn't have (but I dont think so.. everything I pulled out was already disconnected)
can anyone tell me what wires involving the heater go through to the engine bay, and what they're connected to?
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Location:
Brisbane
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 06:01
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There should be two wires going to the big valve thing on the firewall (passenger side). If you knocked one of them out with your fiddling, the heater won't work. There's also a VSV nearby which is involved in the operation of the heater, so check it's connected properly as well.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 06:23
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big valve thing?
and on that subject, what's the thing at the back of the inlet manifold (near the firewall)_ that looks sorta like the tps?
I ask, because most of the wires going to it aren't connected, and want to know if I can just remove it
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Location:
Brisbane
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 06:49
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I'm talking about the heater valve. Look at where your heater hoses go and you'll see what I'm talking about.
The thing at the back of the inlet manifold is the IAC (Idle Air Control) unit; this is what the factory ECU uses to control the idle speed. If it's not hooked up you don't need it.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 07:13
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consider it gone
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Location:
sydney
Registered:
March 2003
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 07:25
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hey those heater wires are on a small 2 pin plug
just after the harness comes out of the firewall there is these 2 wires
one is black n yellow i think or just black
the other is yellow
i think when u turn the heater to hot it sends 12v to the solenoid which then usues vacuum to open the heater tap
these wires go inside to one of the big plugs
its not a cheap job to convert from hydraulic to thermo fans
i think from toyota i saw say 200 to 300 for water pump,200 for pulley plus another 300 for big blade fan that bolts to pulley or u can use big thermo which ios about 200 maybe
it doesnt seem like much but then when u add up all the little shit u have to get it gets expensive
best way to run the thermo is to buy as temp sensor and put it in the top rad hose or near the thrmostat
i did a 1j b4 and we bolted a 4age throm fan sensor in the spot near the thrmo fan
then ran a relay to turn fan on
less hassle than tryin to get microtech to do it
and it gives u an extra output on microtech
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Location:
Brisbane
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 10:04
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This is what it cost me:
- new water pump: $130
- pulley: not much, thanks to GiantTomato's big pile of spares
- thermostat: $70
- 2x MA70 aircon fans (the big bastards that to in front of the radiator): free thanks to friends with MA70 front cuts lying around 
- random pieces of steel bar, bolts etc: $fuck all
Not that hard or expensive really!
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 12:13
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mmm.. I think I might go the thermos, then if I'm feeling affluent after I can always get rid of all the hydro stuff
just pulled off the idle controller then
unfortunately, I did it while the engine was running (not relaly thinking)
so everything went great till I snipped the wires and they fell against the engine block.
cloud of sparks, then a few seconds later then engine gets very sick then dies.
turn the key.. cranks.. but nothing.
wait 5 mins. turn the key. starts, but has a REALLY unhealthy sound to it, just manages to keep itself running, but if you touch the accelerator it dies.
now I'm a little worried
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Location:
sydney
Registered:
March 2003
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 12:30
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hehe
is this with microtech fitted
make sure u got fuel pressure or fuel pump goin
might have blown a fuse
if u r runnin miocrotech im sure the 4 outside wires from dile motor dont connect to microtech but the 2 middle ones are black/red and on a std efi these 2 wires are connected to the power wires for the ecu
just check all fuses
but if the main power to idle motor is connected to power for microtech u might hav spiked it
have u got a hand controller if u have
plug it in n see if any errors
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 12:39
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shit
yeah, it was the 2 black w/ red stripes that touched the block
fuel pump is definitly going, as it will start, and sort of idle.
it dies after bout 10 secs though
the microtech power goes straight from the battery.. I cant see how it could spike without going through the fuse? although I guess I could have damaged it regardless.
I dont have a hand controller.. any other ideas? I kinda need my car for work :\
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Location:
sydney
Registered:
March 2003
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 13:11
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thats the red power for microtech
it still uses ignition power on the pink wire on micortech which could spike it
like u siad maybe its lost the maps
maybe try unpluggin htrottle sensor see if it still dies when u rev it
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Wed, 09 July 2003 19:50
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ok
now this morning it wont start at all.. so maybe there was enough fuel pressure last night to keep it running for the 15 seconds I tried it?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: I hope I didn't need that - 1jz component
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Thu, 10 July 2003 00:32
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it's alive
*cackles*
simple as a fuse, but boy did it have me freaking out I'd busted the microtech
thanks for the help sideshow
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