misfire

2003 CADILLAC DEVILLE
157 MILES • V8 • 2WD • AUTOMATIC
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CADILLAC KRIS
  • MEMBER
  • 1 POST
Let car sit over 30 days and gas got bad, when I came back to start it, it was skipping with a misfire, changed spark plugs, put new gas in it as well as injection cleaner but it still has slight misfire
Mar 18, 2011 at 11:21 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
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
12.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-
Mar 18, 2011 at 11:26 AM
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