- Clogged fuel filter
- Faulty fuel pressure regulator
- Clogged fuel injectors
Cause 2. Ignition system
- Faulty spark plugs
- Faulty spark plug wires
- Faulty distributor cap and rotor (if applicable)
Cause 3. Air intake system
- Clogged air filter
- Faulty mass air flow (MAF) sensor
- Faulty throttle position sensor (TPS)
Cause 4. Engine mechanical problems
- Worn or damaged piston rings
- Worn or damaged valve seats
- Low compression
- Faulty timing chain or belt
Cause 5. Electrical problems
- Faulty battery
- Faulty alternator
- Faulty wiring
To troubleshoot the problem, you will need to perform a series of tests to determine which system is causing the problem. Once you have determined the cause, you can then repair or replace the faulty component.