1999 Nissan Quest

Engine Performance problem
1999 Nissan Quest 6 cyl Front Wheel Drive Automatic 146000 miles

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.
R whitener
July 22, 2010.

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.