- Listen for the hum of the fuel pump when the key is turned to the "ON" position.
- If the fuel pump is not humming, it may be faulty and need to be replaced.
Check the fuel pressure regulator to make sure that it is functioning correctly.
- A faulty fuel pressure regulator can cause the fuel pressure to be too high or too low, which can lead to engine problems.
Check the fuel injectors to ensure that they are clean and free of debris.
- Dirty or clogged fuel injectors can cause the engine to run lean or rich, which can lead to performance problems.
Check the spark plugs to make sure that they are clean and properly gapped.
- Worn or damaged spark plugs can cause the engine to misfire, which can lead to running problems.
Check the ignition timing to make sure that it is correct.
- Incorrect ignition timing can cause the engine to run poorly and may even cause it to stall.
Check the air filter to ensure that it is clean and free of debris.
- A dirty air filter can restrict airflow to the engine, which can lead to running problems.
Check the battery to ensure that it is properly charged and terminals are clean.
- A weak battery can cause the starter to crank slowly, which can make starting the engine difficult.
Check the engine coolant level to ensure that it is full.
- Low coolant can cause the engine to overheat, which can lead to serious engine damage.
If you have checked all of these items and the engine is still not running, you will need to take it to a qualified mechanic for further diagnosis.
