Rough, Unstable, or Incorrect Idle, Stalling

1. Faulty motor mounts.
2. Throttle cable sticking or binding.
3. Improper ignition timing.
4. Improper alternator output voltage.
5. Faulty PCV valve.
6. Improper evaporative emission control system operation.
7. A/C refrigerant pressure too high, overcharged system or faulty pressure switch.
8. Vacuum leaks.
9. Improper battery cable connections.
10. Improper EGR valve operation.
11. Improper compression.
12. Faulty spark plugs.
13. Faulty spark plug wires.
14. Faulty distributor cap and or rotor.