1998 Chevy Truck engine miss

Tiny
EDDIELOGAN
  • MEMBER
  • 1998 CHEVROLET TRUCK
1998 Chevy Truck 6 cyl Two Wheel Drive Automatic

1998 4.3 liter misses only when AC is on and going uphill. Any ideas?
Sunday, July 25th, 2010 AT 7:02 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.
10. Throttle position sensor.
11. Idle air control valve.
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Sunday, July 25th, 2010 AT 10:54 PM

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