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Old 09-02-2007, 06:56 PM   #1
EpilepticPuppy
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Angry I give up...

I did a rebuild because I thought I had a bhg....while the head was off it was machined and milled at a engine shop. Put the thing back together, timing was done by a mechanic, and I have cleared out all the errors.

The problem is that when it starts it dies right away unless I give it gas. Then it won't stay started unless I keep it above 2k rpms. Is there anyway I could have put something back together wrong to make this anomaly not stay idle but still run at higher rpm?

I have changed the fuel filter. There is fuel pressure because I cracked open a bolt to see if it was torqued right, and it was.
I checked the vacuum hoses and they are all routed correctly.
I have tried kicking the tires.
I have tried talking nice to it.

But nothing seems to be helping.....Anyone have any suggestions before I take it to the dealer and give them a bag of money? If anyone guesses the problem correctly I will buy them a steak dinner, no joke.

It's an 89 NA supra exterior white with blue interior if that helps.
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Old 09-02-2007, 07:33 PM   #2
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Theres a idle control screw in/on the throttle body, check that to see if its there. Its on the opposite side of the oil breather lines facing the front of the car.

Last edited by Chambers; 09-02-2007 at 07:37 PM.
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Old 09-02-2007, 11:34 PM   #3
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Right off I'm thinking fuel pump.
Fuel filter.
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Old 09-03-2007, 02:11 AM   #4
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Quote:
Originally Posted by supramacist
Right off I'm thinking fuel pump.
Fuel filter.
if the fuel pump is screwed, wouldnt it not start at all?
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Old 09-03-2007, 01:38 PM   #5
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I thought about that after i posted and then thought fuel filter.

Yes. It wouldn't fire up if you weren't getting any gas.

My 91 has 2 filters.
One is in the tank and the other is under the body up under the rear seats.
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Old 09-03-2007, 06:28 PM   #6
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I had a similair problem, my motor would sputter when started up and would die unless I kept it above 1700 RPMs... Check to make sure your vacuum lines aren't cracked and are routed correctly. I had two go to the wrong place, switched them around, and now she purrs at a good 700 RPMs, nice and strong.
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Old 09-04-2007, 01:21 AM   #7
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Make sure that when you put the intake manifold back together you didnt get a bracket or something stuck between them because it causes a nasty vaccum leak. When you get it running like you said have someone give it gas and look to see if your exhaust manifold is glowing red that is a dead give away that it has a vaccum leak somewhere and it is running lean.
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Old 09-04-2007, 02:28 AM   #8
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This happend to me, When i put on the exgaust manifold i didnt put the heat shield on and it melted the intake tube and put a hole in it. I didnt think about the small things. When i melted the tube, I threw about 100 buck at the car in parts and all it was, was a hole in the Intake tube. It could also be the TPS or the Massairflow sensor, make sure these are pluged in there easy to miss.
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Old 09-04-2007, 05:56 AM   #9
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I had an Isuzu Imark that would only run if I was on the gas and it was the fuel pump.
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Old 09-06-2007, 07:21 AM   #10
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I'm sorry I didn't see this sooner. The first thing I would check is the FC switch in the N/A AFM. Turbo models don't have this and it's usually not suggested, but I've seen them fail for a few people (unfortunately, usually after they'd spent a bunch of money on other things).

http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=95

A couple other possibilities are timing (yup, still a possibility) physical or ignition, TPS IDL switch, fuel pump, fuel pump relay and/or resistor pack, clogged ISC or dead stepper motor in the ISC, bad alternator (try charging the battery and see if the car will idle at least for a while with a full battery), and lastly, a bad ignitor.
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