. Vacuum leaks: Check all vacuum hoses and connections for any cracks or leaks. This can result in incorrect air/fuel mixture going into the engine.
2. Faulty Engine Management System:
- Check for any fault codes stored in the ECU using a diagnostic tool or have it professionally diagnosed.
3. Fuel System Issues:
- Check fuel pressure to ensure that the fuel system is delivering enough fuel.
- Inspect the fuel filter and make sure it is not clogged.
4. Timing Issues:
- Ensure that the timing belt is installed correctly and not skipped a tooth.
- Check the ignition timing to ensure the spark is happening at the correct time.
5. Ignition System:
- Test the spark plugs, spark plug wires and the ignition coil to make sure they're functioning correctly.
6. Airflow issues:
- Check the air filter to make sure it is not blocked.
7.Faulty Sensors:
- Check for any faulty sensors such as the Oxygen sensor, Mass Airflow (MAF) sensor, and Throttle Position Sensor (TPS) as these can affect engine performance.
