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Old 06-15-2003, 08:55 PM   #1
swervin ervin
You get what you pay for
 
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Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
Smile Are we having fun yet??

I'm having so much fun, I can't take much more.

Trying to get the van running right and it's about to woop me. It's TBI and I'm quickly learning what makes it tick. My biggest problem is I can't get it to idle at the proper rpm. It wants to run at around 1200 rpm all the time at idle. The idle speed is computer controlled with absolutely no mechanical way to adjust it. Let's see, here's what I've done.

Rebuilt the throttle body, new IAC valve, new TPS, new fuel filter, new O2 sensor, tried another ECM from the junkyard, new Prom for the ECM, etc.

Bought a Chiltons manual and started reading everything I could find on TBI fuel injection. Tried every test I could do with a digital volt meter. Nothing helped the idle. I was having a problem with a rough idle when it was cold, but did fix this, but not the speed.

After reading a bunch, according to what I could find the biggest problem with a idle too high is a intake air leak. Well, seeing as how I had a oil leak at the back of the intake, guess what, it's off. I'm going with new intake gaskets, new valve cover gaskets, and oil pan gasket.

I'll get this thing running right if it's the last thing I do.

Have I mentioned I hate TBI???
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1985 Chevy C-10
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