2002 Nissan Sentra Misfire

2002 NISSAN SENTRA
195,000 MILES • 4 CYL • FWD • AUTOMATIC
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CALO182
  • MEMBER
  • 1 POST
My Nissan Sentra 2002 4cyl misfires only when it starts and the engine is cold. It has a very rough start and the idle gets very low when I put it in Drive.

I already change the spark plugs.
May 11, 2010 at 9:31 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 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.Throttle position sensor.
11.Idle air control valve.
May 11, 2010 at 8:16 PM
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