- Incorrect spark plug gap
- Worn-out spark plugs
- Damaged spark plug electrodes
2. Ignition coil problems:
- Faulty ignition coils
- Bad spark plug wires
- Distributor cap or rotor issues (for older vehicles)
3. Fuel injector issues:
- Dirty or clogged fuel injectors
- Leaking fuel injectors
4. Engine timing problems:
- Incorrect timing belt or chain
- Worn timing chain tensioner
5. Vacuum leaks:
- Cracks or holes in vacuum hoses
- Faulty PCV valve
6. Compression problems:
- Worn piston rings
- Leaking valves
7. Engine overheating:
- Insufficient coolant
- Faulty thermostat
- Clogged radiator
8. Electrical problems:
- Faulty ignition switch
- Bad battery connections
- Loose or corroded wiring