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1992 GMC Typhoon 4.3L Poor Idle Quality
Posted to GM Driveability on 2/17/2015 12 Replies

When engine is at operating temp, it idles rough. Ignition looks good on the scope. While monitoring with a modus, map sensor doesn't look right so I add vacuum with a hand pump, and smooths out fairly well when I supply the sensor with 10 inHg. With key on en...

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  Related Documents & Media  1992 GMC Typhoon

 
Message Closed w/FIX

car Vehicle Data

1992 GMC Typhoon

VIN 1GDCT18Z8N
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection
SymptomsPoor Idle Quality
OccursAlways, Hot, Idle
Message Closed w/FIX

car Vehicle Data

1992 GMC Typhoon

VIN 1GDCT18Z8N
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection
SymptomsPoor Idle Quality
OccursAlways, Hot, Idle