1. Fuel Pressure Regulator: A faulty fuel pressure regulator can fail to maintain the necessary pressure in the fuel line. This could lead to the engine not receiving enough fuel, causing it to start then immediately die.
2. Clogged Fuel Filter: If the fuel filter is clogged, it will not allow the fuel flow properly, leading to the same fuel starvation issue and causing the engine to start and immediately die.
3. Faulty Fuel Pump: If the fuel pump is not functioning properly, it may not be able to provide the required amount of pressure or volume of fuel to the engine, causing it to start and die immediately.
4. Distributor Cap and Rotor: A faulty distributor cap or rotor could also result in starting then dying issue, especially if they have excessive wear or damage.
5. Faulty Ignition Module: A faulty ignition module could also result in a weak spark or intermittent spark that can cause the engine to start and then immediately die.
Troubleshooting Steps:
1. Check Fuel Pressure:
- Connect a fuel pressure gauge to the fuel rail to check fuel pressure.
- The fuel pressure should be within the specified range provided in your vehicle's manual.
- A low fuel pressure could indicate a faulty fuel pump, fuel pressure regulator, or a clog in the fuel line.
2. Check Fuel Filter:
- Inspect the fuel filter for any visible dirt or debris.
- If it appears dirty, replace the fuel filter.
3. Inspect the Distributor Cap and Rotor:
- Remove the distributor cap and inspect the rotor and cap contacts.
- If you notice any signs of burning, corrosion, or excessive wear, replace the cap and rotor.
4. Test Ignition Module:
- Use an Ohmmeter to test the resistance of the ignition module according to your vehicle's service manual.
- If the readings are not within specifications, replace the ignition module.
5. Check and Clean the IAC Valve:
- The IAC (Idle Air Control) valve may be sticking or dirty, preventing it from regulating the idle speed.
- Clean the IAC valve with a suitable cleaner.
6. Verify Timing:
- Confirm that the ignition timing is set correctly.
7. Scan for Diagnostic Codes:
- Connect an OBDII scanner to your car to check for any stored diagnostic trouble codes (DTCs).
>Note: If you are not confident in performing these troubleshooting steps, it would be best to seek assistance from a professional mechanic.
