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Re: 1991 chevy 1500 5.7 tbi erratic idle
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Originally Posted by tpulliam79
checked lines no leak... new intake and gaskets and now it seems to only do it in park and reverse? I love my truck but am real close to trading her in ....gotts get through emissions and at this point its not gonna happen . Not to mention the 70 inches of snow we have gotten in the last 3 weeks.
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Do you know some that can hook a scanner(not a code reader) to look at data, and possible pull the soft codes(codes that do not trip check engine light on) if there are any?
The other question would be, has the O2 Sensor been replaced? That sometimes can cause it. Thats were a scanner would come in handy, you could see if the O2 is switching or not. Also you could see if the IAC is working properly. In fact trying tapping the IAC when in park and see if the idle changes.
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94 K1500 Ext. Cab Long Bed, 260,000 miles.
MSD Blaster Coil, MSD Disturbtor, K&N Air Filter, TBI Riser Plate.
7 1/2 foot Blizzard Plow.
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