Sometimes it'll stall without putting it in drive. I can pull each plug wire off one at a time and it stalls,which makes me think each plug is firing. I recently replaced the coil. I cleaned the portal for the IAC and even replace the IAC. No change. This is a 4.3 V6 engine.
Engine stalls at idle when I put in drive. It feels like it's missing. on 1990 Chevrolet S10 Blazer
Asked by for the 1990 Chevrolet S10 Blazer
Check for vacuum leak(s) more likely EGR valve is stuck open!!!! Tap it with a wrench, or such, to see if that helps.
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agree with wetry. try having a smoke test done to find source of leak
Problem solved. I can tell you a lot of things it is not (because I replaced some parts). The real problem that fixed it was the IGN Module inside the base of the dist. Thanks for the suggestions. Cliff.