× 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 GTP 3.8L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 5/5/2010 12 Replies

Good evening all!

I believe we have a problem with a sticking exhaust valve in this car and before we go further I would like to see if any one else has seen this.

The background: car was brought into us to replace a leaking rear valve cover. This was done a...

12 Replies Received (View Replies)

  Related Documents & Media  1999 Pontiac Grand Prix GTP

 
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Prix GTP

VIN 1G2WR5215X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle
Misc.Supercharged

Trouble Codes

P0304Cylinder 4 Misfire Detected
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Prix GTP

VIN 1G2WR5215X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle
Misc.Supercharged

Trouble Codes

P0304Cylinder 4 Misfire Detected