1990 Nissan p/u SE-V6 running rough

Tiny
KINGRICHIE
  • MEMBER
  • 1990 NISSAN TRUCK
  • 6 CYL
  • 2WD
  • MANUAL
  • 140,000 MILES
Past 2 years, intermittent problem. Truck runs great for months then begins to sputter and run rough, especially noticeable up hill. Never kills or stalls. Then magically, everything goes back to normal until the next time. Don't have a clue. Auto choke stuck open? Motor mounts?
Sunday, February 6th, 2011 AT 2:05 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light and when was the last tune-up?

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. Vacuum leak
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
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Sunday, February 6th, 2011 AT 12:50 PM

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