Engine dies at idle speed

10

Asked by Aug 19, 2017 at 05:08 PM about the 1994 Chevrolet Blazer

Question type: Maintenance & Repair

I just replaced a faulty ignition control module,  
truck starts and runs well.  But dies at idle speeds,
could it be the 2 prong contact is plugged in
backwards?

4 Answers

78,065

Sounds like a bad IAC (Idle Air Control) valve. HTH. -Jim

10

Thanks, stupid question where do I find it? My other chevy knowledge is a 68 C20 custom ordered from factory...

1 people found this helpful.
78,065

The IAC will be on the throttle body. It screws into the throttle body and has a 4 way electrical connector plugged into it. HTH. -Jim

10

Hey all, new problem with idle stalls. Well same problem. I have replaced the idle bypass valve, throttle position sensor, and egr valve. After egr the idle became even worse climbing up to around 2k rpm then dropping off and stalling out, and is now running very rough. Any thoughts on what I am missing here?

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