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Old 08-10-2011, 08:22 PM   #1
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Join Date: Jul 2009
Location: PA
Posts: 2,615
Car: 1996 Camaro, 1985 Camaro
Engine: 3.8, 3.4
Transmission: WC T5, 700r4
Axle/Gears: 3.23(?), 3.42

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Can a bad IAC or TPS cause misfires/stalling/no starts?

It's not my camaro I am having the problems with, but still a general knowledge question, I swapped TBs on my other car, the "new" one is simply a 3400 tb, and I put it on my 3100 engine, only difference in the throttle bodies is size, even went so far as to look up the IAC and TPS part #s and they are the same, but for some reason the car runs like **** and misfires(or sounds like it is) if it all on the 3400 TB but runs just fine with the original 3100 TB. I ran out of daylight, but tomorrow I will swap the sensors out even though I shouldn't have to...
Just doesn't make sense to me that a wonky TPS or IAC could cause the issues it has with that tb on it...
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Old 08-11-2011, 01:29 AM   #2
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Location: Sebastopol CA
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Car: Base 91 'bird
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Re: Can a bad IAC or TPS cause misfires/stalling/no starts?

Are you swapping the TPS and IAC as well?
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Old 08-11-2011, 10:32 AM   #3
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Join Date: Jul 2009
Location: PA
Posts: 2,615
Car: 1996 Camaro, 1985 Camaro
Engine: 3.8, 3.4
Transmission: WC T5, 700r4
Axle/Gears: 3.23(?), 3.42

Classifieds Rating: (0)
Re: Can a bad IAC or TPS cause misfires/stalling/no starts?

I am going to, though I shouldn't need to unless they are bad, both TBs use the exact same sensors. And its weird the issues it causes running the 3400 TB, but we'll see what happens with the sensors swapped...
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Old 08-11-2011, 10:32 AM
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