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kavemanlee · 02-01-2009, 09:50 AM

I have the same truck with the same symptom if yours is an automatic also. A local mechanic isolated it down to the probability of the gear selector sending mixed signals,ie; "I'm in Drive, now I'm in Nuetral, now I'm in Drive". I haven't tried to fix it yet but my idle remains mostly stable at 550 rpm if the traffic light isn't too long.

02-01-2009, 09:50 AM	#147
kavemanlee Kavemanlee Join Date: Dec 2006 Location: Olympia, WA Age: 52 Posts: 1	Re: 1991 chevy 1500 5.7 tbi erratic idle seafoam question I have the same truck with the same symptom if yours is an automatic also. A local mechanic isolated it down to the probability of the gear selector sending mixed signals,ie; "I'm in Drive, now I'm in Nuetral, now I'm in Drive". I haven't tried to fix it yet but my idle remains mostly stable at 550 rpm if the traffic light isn't too long.