1999 Buick Regal Engine miss

1999 BUICK REGAL
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DEENIE
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1999 Buick Regal 6 cyl Automatic 90000 miles

Severe engine miss at times may run 20 min fine then miss when either idling or driving. May completely die. Will start right back up without difficulty. Have changed plugs, wires, fuel filter, fuel pump and one coil pack that was alittle corroded on q prong. Ign module plate read out ok. Any suggestions.
May 6, 2010 at 12:06 PM
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RASMATAZ
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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.
May 6, 2010 at 12:31 PM