- Check battery cable connections for tightness and corrosion.
- Check the alternator connections and ensure they are tight and free of corrosion.
- Check the ignition switch for any loose or damaged wiring
- Test the starter motor to ensure it is functioning properly.
Fuel system:
- Verify fuel pressure is appropriate.
- Examine fuel lines and components for leaks.
- Check the fuel filter and replace if necessary.
- Inspect the fuel injectors and ensure they are delivering the right quantity and pattern of fuel.
Idle Air Control (IAC) valve:
- Test the IAC valve to make sure it is regulating idle speed correctly.
- Clean or replace the IAC valve if necessary.
Vacuum leaks:
- Check the entire vacuum system for leaks or cracks, particularly around the intake manifold, throttle body, and vacuum lines.
- Repair or replace any leaking components.
Throttle Position Sensor (TPS):
- Examine the TPS for appropriate voltage readings.
- Clean or replace the TPS if necessary.
Coolant Temperature Sensor (CTS):
- Test the CTS to ensure it's sending the correct temperature readings.
- Replace the CTS if it's malfunctioning.
Crankshaft Position Sensor (CKP):
- Check the CKP sensor and make sure it's positioned properly.
- Clean or replace the CKP sensor if damaged or malfunctioning.
Oxygen Sensor:
- Test the oxygen sensor to ensure it's functioning correctly.
- Replace the oxygen sensor if faulty.
