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2001 GMC C-Series Topkick C7H042 8.1L Misfire
Posted to GM Driveability on 7/7/2009 11 Replies

this truck has a misfire on cyl #7, worse when hot. it has spark,good fuel pressure, good [...] coils to different cylinders and plugs. changed intake gasket. pulling hair out. no codes.

11 Replies Received (View Replies)

 
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car Vehicle Data

2001 GMC C-Series Topkick C7H042

VIN 1GDJ7H1E31
Engine8.1 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / port fuel
EmissionsOBD-II Compliant
SymptomsMisfire
OccursAlways
Message Closed

car Vehicle Data

2001 GMC C-Series Topkick C7H042

VIN 1GDJ7H1E31
Engine8.1 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / port fuel
EmissionsOBD-II Compliant
SymptomsMisfire
OccursAlways