Engine Surges
- Check spark plugs.
- Check fuel pressure.
- Check for vacuum leaks.
- Check for cracked distributor cap or rotor.
- Check ignition and valve timing.
- Check for clogged fuel filter.
- Check for faulty ECM.
- Check for malfunctioning electronic fuel injection system.
- Check for malfunctioning EGR valve (if equipped).
- Check for malfunctioning distributor mechanical and vacuum advance (if equipped).
- Ensure sufficient secondary spark is available.