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91 sonoma won't idle


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Sammesey
New User

Nov 9, 2013, 5:34 PM

Post #1 of 4 (2103 views)
91 sonoma won't idle Sign In

My 91 gmc sonoma won't idle and runs very rough. It has a 4.3L and I've tried everything. It's showing an engine code 24.


(This post was edited by Sammesey on Nov 9, 2013, 5:36 PM)


nickwarner
Veteran / Moderator
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Nov 9, 2013, 5:37 PM

Post #2 of 4 (2099 views)
Re: 91 sonoma won't idle Sign In

What have you tried? Lets start with codes. You need nothing but a paper clip to get those. What codes are coming up? How many miles are on this? Have you cleaned the back of the throttle plate and IAC bore? Is the IAC motor one of the things you have changed? Are there any other issues with driveability? How long ago did this start?


Sammesey
New User

Nov 9, 2013, 5:42 PM

Post #3 of 4 (2097 views)
Re: 91 sonoma won't idle Sign In

It's showing a code 24. I replaced egr, throttle positioner and map sensor


Sammesey
New User

Nov 9, 2013, 5:44 PM

Post #4 of 4 (2095 views)
Re: 91 sonoma won't idle Sign In

No other issues other tha won't idle and runs very rough.






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