idles rough

1990 OLDSMOBILE CIERA
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 6:04 PM
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RASMATAZ
  • ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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 6:51 PM
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