Engine Misses Intermittently

We listed possible causes of the problem engine misses intermittently:

1. Incorrect mixture
2. Improper grade of fuel
3. Water in fuel
4. Air leaks in induction system
5. Slow valve action
6. Defective magnetos or ignition harness
7. Distributor points or contact breaker points dirty or pitted
8. Carburetor air heater defective
9. High oil temperature
10. Defective spark plugs
11. Improper timing
12. Carburetor icing
13. Magneto ground wire swinging and periodically grounding

Truck resource center for engine faults.

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