Mechanics

CHEVY 05 MISFIRE

2005 Chevrolet Impala

Shakes or Wobbles problem
2005 Chevy Impala 6 cyl Front Wheel Drive Automatic

my 05 chey impala has a misfire and I have checked all spark plugs nd cables also did compression test nd it all checked out good. All coil packs are good and working. I have not checked injectors but when I disconnect the cables to spark plugs it cuts off a bit so woukld that mean that they are working. Also wanted to know if it would have a miss if the fuell pressure regulator was faulty nd injecting gas into the intake through the vaccume hose?
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Stang06
July 13, 2010.



Engine running rough or misfiring can be cause by the following: 1. Defective spark plug
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Idle air control valve.

Rasmataz
Jul 13, 2010.