1999 Nissan Quest MISSING

1999 NISSAN QUEST
146,000 MILES • 6 CYL • FWD • AUTOMATIC
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R WHITENER
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  • 1 POST
The motor fine 4 5 or 6 miles even if running at WOT starts skipping and gets worse for a mile or 2 until it will almost stop have removed catalic conv drove still same skip but now not quiet as bad checked fuel press app, 38 lb on idle 43 when idled up no codes on dash such as check eng . un plugged MAF SENSOR to make sure light was wrking . Light works fine and code was correct,
Jul 22, 2010 at 9:33 AM
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RASMATAZ
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  • 75,992 POSTS
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.
10.Throttle position sensor.
11.Idle air control valve.
Jul 23, 2010 at 1:26 AM