1993 Buick Regal miss

1993 BUICK REGAL
110,000 MILES • 6 CYL • FWD • AUTOMATIC
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DILLYRAY2
  • MEMBER
  • 1 POST
after replacing tps and engine light out car developed miss afterwards have replaced plugs and wires performed ohms check for fuel injectors replaced cracked ignition coil still have miss
May 14, 2010 at 12:53 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Engine running rough or misfiring can be cause by the following-inspect and test all the following below:
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.Idle air control valve.
May 14, 2010 at 9:45 PM
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