at 800 to 1000RPM or idle speed engine misses or shakes, but above 1500RPM the misses or shakes is minimal.
Feb 20, 2010 at 2:45 PM
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RASMATAZ
CAR REPAIR CONTRIBUTOR
75,992 POSTS
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.
Feb 20, 2010 at 3:53 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.