idles rough

54,000 MILES • 6 CYL • FWD • AUTOMATIC
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LIBERTY275
  • MEMBER
  • 1 POST
1990 oldes cutless ciera 3300 engine
idols rough i changed plugs wires and filters
Nov 14, 2010 at 10:04 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Could be caused by one of 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.Manifold absolute pressure sensor
Nov 14, 2010 at 10:51 AM
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