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1999 Chevy S-10 engine misfire

Tiny
JFH261
  • MEMBER
  • 1999 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • MANUAL
  • 168,000 MILES
The car will run great at times then for no aparent reason will run estremely rough, not want to start and if it does start won't pull a load.
What could be causing this intermitent problem?
Saturday, May 22nd, 2010 AT 8:09 AM

2 Replies

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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Saturday, May 22nd, 2010 AT 11:49 AM
Tiny
JFH261
  • MEMBER
  • 4 POSTS
Problem now it acts like it ran out of gas but if I shut it off and pump the gas pedal it will restart and run fine for a while
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Monday, May 24th, 2010 AT 6:50 PM

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