Engine Performance problem
1999 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 162000 miles
I have been having this problem for quite some time and I can't seem to nail the cause down. I have a lack of power and I can get my CHECK ENGINE light to come on every day if I want to. Every once in a while it would be for a specific cylinder but 95% of the time, I get the code for random misfire. So far I have changed:
Spark Plugs (twice)
Ignition Coils (all 3)
Air Filter (twice)
Fuel Filter (twice)
Fuel Pressure Regulator
I have also checked and verified the fuel pressure is correct.
Are there any other sensors that may cause this code and engine performance?
Any help would be greatly appreciated.
have the same problem?
Thursday, January 28th, 2010 AT 8:49 PM