1992 Ford Mustang intermittently runs poorly at times

Tiny
KPGRACI
  • MEMBER
  • 1992 FORD MUSTANG
Computer problem
1992 Ford Mustang 4 cyl Two Wheel Drive Manual lots miles

On cold start runs good for trip. On second start up runs good for a while, then for 5-15 seconds at some point it will run very poorly (like on 1 or 2 cylinders) then recover and run 100% fine.

suspect computer, coil, ect, problem is, it runs fine most of the time and it is unpredictable when it will happen.

any ideas on how to test or what to replace first?

Thanks,
kpg
Monday, February 22nd, 2010 AT 3:51 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Monday, February 22nd, 2010 AT 3:59 PM

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