1997 3.8 thunderbird began missing & runnibg rough especially at idle & low rpms. Problem began overnight with no warnings
Feb 19, 2010 at 2:16 PM
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RASMATAZ
CERTIFIED EXPERT
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.