× 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
2001 GMC Sierra 1500 SL 4.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 9/17/2007 10 Replies

CUST CAME IN WITH A P0300. DID MAJOR TUNE UP. STILL HAD MISFIRES ON B2. CHECKED FUEL PRESSURE, COMPRESSION, AND INJECTOR BALANCE, AND TIMING. ALL OK. REPLACED CAM SENSOR DO TO CORROSION IN DISTRIBUTOR. REPLACED POPPETS FOR TSB UPGRADE TO MPFI INJECTORS. RECORD...

10 Replies Received (View Replies)

  Related Documents & Media  2001 GMC Sierra 1500 SL

 
Message Closed w/FIX

car Vehicle Data

2001 GMC Sierra 1500 SL

VIN 1GTEC14W41
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2001 GMC Sierra 1500 SL

VIN 1GTEC14W41
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected