3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

car is choking any1 got any ideas?

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Old Dec 18, 2004 | 08:03 PM
  #16  
85irocrebuildtpi's Avatar
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Re: car is choking any1 got any ideas?

Originally Posted by aklim
The IAC housing is under the TB and is held to the tb by 7 or 8 torx screws. You might have to change the gasket if you take it out. There is a coolant hose going and coming from it. You could bypass that if you wanted. I did. Take the torx screws out and clean the passages.

The IAC motor has a cone shaped thing at one end when you take it out. The cone part is the pintle. Make sure that is clean. When you take out the TB ahd have it in your hand. Look at the underside. You will see the IAC, Unscrew that. Clean that. Take off the torx screws. Clean that and the passages with brake cleaner as best as you can. Reassemble.


When you make idle adjustments with the screw, your TPS voltage will change. That set screw will move the linkage forward to open the throttle blades more or backward to close the throttle blades. Tht set screw is on the driver side. You will see a screw that does not allow the linkage to go any further when there is no tension. That is what you need to adjust. Of course, adjusting that will change your TPS voltage so after getting your IAC counts into the right zone. you will have to readjust the TPS. Like I said, if you did have to make a lot of adjustments, the TPS might be way off. Anyways, thjat is something to check after you get the IAC done.

I don't have a shop. My shop is my garage. If you were in Madison, I might be able to show you what I am talking about as far a swhat you are doing.

my TPS is on at 53 volts
i dont have a scanner so it looks like i need my sunoco peoples computer


a big question is can the cold start sensor be bad and therein choking the idle out with crappy info or is it the IAC, the computer should tell the story

i broke her in today, what a pleasure to drive, awesome power and nice suspension i am very happy
Old Dec 19, 2004 | 09:55 AM
  #17  
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Re: car is choking any1 got any ideas?

IF the IAC were not adjusted properly, it might be asking for more air and the IAC might be maxed out and then it would run rich. Hard to say till we get IAC counts.

Cold Start Sensor? You mean IAT? Hard to say without the scanner. It should tell you what the temp is and you can compare it with a thermomemter. You leave the car outside overnight and turn it on with the scanner attached and you can see what temp it reads and what the termometer says and it should be close.

You might also have a cold start injector that is clogged. Do you have 8 or 9 injectors?
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