engine running rough

2001 VAUXHALL VECTRA
149,500 MILES • 4 CYL • 2WD • MANUAL
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TBONE
  • MEMBER
  • 1 POST
my car runs rough when it is warm. From cold start it is fine, but if I stop and restart engine when warm it is idiling rough and lacks power when building speed to change gear.
Apr 22, 2011 at 1:01 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Engine running rough or misfiring can be cause by the following:

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-
Apr 22, 2011 at 1:13 AM
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