× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
2006 Hummer H3 3.5L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 9/28/2012 17 Replies

I am having trouble finding a definitive answer to why this vehicle has a misfire on cyl #2 at an idle. The code I have is for a random misfire but watching it on the modis shows cyl #2 missing all the time at an idle. I swapped the ignition coils, swapped the...

17 Replies Received (View Replies)

  Related Documents & Media  2006 Hummer H3

 
Message Closed

car Vehicle Data

2006 Hummer H3

VIN 5GTDN13636
Engine3.5 L / 5 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0128Cooling System Malfunction
P0300Multiple Misfire Detected
Message Closed

car Vehicle Data

2006 Hummer H3

VIN 5GTDN13636
Engine3.5 L / 5 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0128Cooling System Malfunction
P0300Multiple Misfire Detected