× 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
1999 Pontiac Grand Prix SE 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out
Posted to GM Driveability on 7/10/2003 8 Replies

Have a problem with this monster. When in closed loop runs ok, for no reason will go back into open loop and at this time car wil only run at half throttle or better. The o2 rearing goes to .900v, fuel trims long and short are -23 but inj pulse with goes to 50...

8 Replies Received (View Replies)

  Related Documents & Media  1999 Pontiac Grand Prix SE

 
Message Closed

car Vehicle Data

1999 Pontiac Grand Prix SE

VIN 1G2WJ52K5X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts Out
OccursIntermittently
Message Closed

car Vehicle Data

1999 Pontiac Grand Prix SE

VIN 1G2WJ52K5X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts Out
OccursIntermittently