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Location:
Western Syd
Registered:
October 2002
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 2T-GEU - Need Help....
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Thu, 17 October 2002 09:50
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Hi ppl,
I have recently acquired a beautiful Toyota T18
with a 2T-GEU in it, amongst other goodies,
but i need some help....
my primary problem at the moment is that it
will not idle at cold start, i have to use
the accelerator to start it then hold the revs up a bit until
it warms up enough to idle, i really dont like this
as it is an EFI motor and should be better than that.... 
my first thought was that it could be the engine management
system, which is the stock standard one but I called an EFI place and he reckons that the old ECU's are dumb (as in not intelligent) and its most likely not that,
he said there should be a device somewhere on the EFI gear
which automatically controls the air-fuel mixture for a cold start and that this should be adjustable, or it may be jammed/blocked etc.
any assistance that anyone can give will be greatly appreciated
also any other tips or info on 2TGEU's would be great.
thanks in advance,
Matty.
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Location:
Brisbane
Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Thu, 17 October 2002 11:13
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Check your cold start injector is functioning correctly - it's bolted to the side of the plenum and has a steel line running to the fuel rail. Use a multimeter to check if it's actually opening when the engine is cold. It is triggered by a thermo switch in the thermostat housing, so if that's not working properly you have no cold start injector which makes it hard to start!
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Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Thu, 17 October 2002 12:21
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It could be your cold start injector, if that isn't working then it really wouldn't help your cold idle, although i've had a 2TGEU start first go and idle well in winter without the cold start connected.
What does it idle at after its warm?
Check theres no vacuum leaks around the manifold, and plug the air conditioner connection up on the manifold if your not using it.
If its your thermo sensor then you need to check your connections between your thermometer housing and computer, if you have a multimeter i think i've got a website link for the resistance/temperature graph of them to check the sensor is operation correctly, or you could try and replace the EFI thermo sensor.
chances are its just something small. A lot of the 2TGEU manifolds these days haven't got the vacuums hooked up correctly, and this makes them idle all over the place.
goodluck
rob
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Location:
Brisbane
Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Thu, 17 October 2002 12:29
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My 18R-GEU is currently running without a CSI and it starts OK, but the idle is a bit lumpy until it warms up. Mind you the weather is quite warm up here at the moment, so it will probably be a bitch in winter!
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Location:
Western Syd
Registered:
October 2002
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Re: 2T-GEU - Need Help....
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Fri, 18 October 2002 02:35
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thanks guys,
when warm it idles nicely at around 850rpm maybe 900
it has extractors and the guy who owned it b4 me said
that the sensor for that is at the point where the 4 pipes come
into one and wasnt sure if that was the correct spot for it,
i actually took the car down to that EFI guy i mentioned this morning and he's pretty sure that its what norbie said, the thingy under the efi gear that has a thing in it that opens and closes, which when cold should be fully open and closed when warm, he was pretty sure i would find that this is jammed and just needs a good lube,
but it makes sense that your suggestions could also be correct that being the sensor or connection itself.
(sorry for the lack of correct terms, not sure what some of these bits are called)
cheers Matt.
either of you guys in sydney?
would you be interested in coming around to help a little with the investigation/repair for a carton of beer or something sometime??? (worht a shot)
thanks in advance
-Matt.
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Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Fri, 18 October 2002 07:13
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sorry matt i'm in adelaide, otherwise i would take a look.
Yep it could also be the air valve, it sort of acts like a choke to let excess air passed the throttle body, hence increasing idle speed. Wierd thing is i also had this disconnected on my 2TGEU and it still started and ran fine! A good check would be to try and bypass this vavle and see what it idles at.
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Location:
Brisbane
Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Fri, 18 October 2002 12:13
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I'm in Brisbane, so I can't help either. 
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Location:
c'town, NSW
Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Fri, 18 October 2002 12:20
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where abouts in western sydney are ya?
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Location:
Western Syd
Registered:
October 2002
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Re: 2T-GEU - Need Help....
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Fri, 18 October 2002 21:41
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Penrith mate.
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Location:
New Zealand
Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Sat, 26 October 2002 07:55
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check the temp sensor reads above 1K/ohm when cold.
Cold start injector shouldn't affect idling.
Check your AFM idle mixture, check the idle screw on the manifold.
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Location:
New Zealand
Registered:
May 2002
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Re: 2T-GEU - Need Help....
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Sat, 26 October 2002 07:58
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Infact, try unplugging temp sensor at the thermostat housing. Car should start easily, but run hell rich.
If this helps, then put a 10K log potientometer in the green wire going to the THW pin on your ecu. then adjust this when you're starting to tell the ecus it's hell cold.
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