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2007 Hummer H3 3.7L Misfire
Posted to GM Driveability on 8/11/2010 1 Reply

Thank you for your help. We have a misfire in cylinder 4 on this 3.7 engine. We have swapped the coils and plugs, and performed a compression and leak-down test with no problems found. We have seen that there are some problems with the intake valves and cylind...

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  Related Documents & Media  2007 Hummer H3

 
Message Closed w/FIX

car Vehicle Data

2007 Hummer H3

VIN 5GTDN13E37
Engine3.7 L / 5 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursCruise, Idle
Message Closed w/FIX

car Vehicle Data

2007 Hummer H3

VIN 5GTDN13E37
Engine3.7 L / 5 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursCruise, Idle