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1988 GMC K1500 5.0L Hesitation, Misfire
Posted to GM Driveability on 3/30/1999

this veh runs great when cold - as soon as it goes into closed loop it bucks/misfires under load - runs ok not under load - ign pattern breaking up - looks lean - have tested / disconnected EGR - tried new MAP - new ECM - ECT reads correctly - has new plugs, r...

 
Message Closed w/FIX

car Vehicle Data

1988 GMC K1500

VIN 1GJDK14H3J
Engine5.0 L / 8 cyl
EmissionsFED
SymptomsHesitation, Misfire
OccursHot, Under Load
Message Closed w/FIX

car Vehicle Data

1988 GMC K1500

VIN 1GJDK14H3J
Engine5.0 L / 8 cyl
EmissionsFED
SymptomsHesitation, Misfire
OccursHot, Under Load