Mechanics

RUN BAD

1999 Pontiac Montana • 6 cylinder 2WD Automatic •

Change intake mainfold gasket and during that changed lifters put every thing back and start engine runs like crap like is missing jumping
changed spark plugs and wires no change
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Dinkec
January 9, 2011.




Engine running rough or misfiring can be cause by the following:

http://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
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.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-

Tiny
Rasmataz
Jan 10, 2011.


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