1. Fuel System:
- Check the fuel lines and connections for leaks or blockages.
- Replace the fuel filter if it is clogged.
- Ensure the fuel tank has sufficient fuel and that the fuel is clean and free from contaminants.
- Inspect the fuel injection pump and injectors for proper function and make any necessary repairs or replacements.
2. Oil Pressure:
- Verify the oil level and ensure it is sufficient.
- Check the oil pressure sensor and ensure it is functioning correctly.
- Inspect the oil pump for any damage or wear and replace it if necessary.
3. Compression Test:
- Perform a compression test to determine if the engine has adequate compression.
- Low compression can cause difficulty starting and running the engine.
4. Electrical System:
- Inspect the battery and ensure it is fully charged and in good condition.
- Check the starter motor and ensure it is functioning correctly and engaging properly with the flywheel.
- Check the ignition system components, including spark plugs, spark plug wires, and distributor (if applicable), and make any necessary replacements.
5. Vacuum Leaks:
- Inspect the vacuum hoses and connections for any leaks or cracks.
- A vacuum leak can cause a lean fuel mixture and difficulty starting the engine.
