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2001 GMC C7500 Topkick C7H042 8.1L Poor Idle Quality, Misfire, lack of power
Posted to GM Driveability on 4/18/2024 12 Replies

Customer concern: Lack of power and popping in the exhaust when in gear. Checked scan tool data and found bank 2 long term fuel trim is at 20%. Checked temperature for each cylinder at exhaust manifold and found all on bank 1 to be around 500 degrees F and...

12 Replies Received (View Replies)

  Related Documents & Media  2001 GMC C7500 Topkick C7H042

 
Message Closed w/FIX

car Vehicle Data

2001 GMC C7500 Topkick C7H042

VIN 1GDJ7H1E41
Engine8.1 L / 8 cyl / GAS
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, Lack of Power
OccursAlways
Message Closed w/FIX

car Vehicle Data

2001 GMC C7500 Topkick C7H042

VIN 1GDJ7H1E41
Engine8.1 L / 8 cyl / GAS
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, Lack of Power
OccursAlways