- Blown fuse
- Bad ignition switch
- Broken wire
- Bad neutral safety switch (automatic transmission only)
- Bad clutch safety switch (manual transmission only)
Distributor problems:
- Bad distributor cap
- Bad rotor button
- Bad ignition module
- Bad pick-up coil
- Worn timing chain or belt
- Faulty vacuum advance or retard mechanism
Spark plug problems:
- Bad spark plugs
- Loose or disconnected spark plug wires
- Carbon tracking on spark plug wires or distributor cap
ECM/PCM problems:
- Bad ECM/PCM
- Faulty wiring to ECM/PCM
- Bad ground connection to ECM/PCM
