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1999 Montana run bad

Tiny
DINKEC
  • MEMBER
  • 1999 PONTIAC MONTANA
  • 6 CYL
  • 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
Sunday, January 9th, 2011 AT 11:17 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following:

https://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-
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Monday, January 10th, 2011 AT 2:03 AM

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