Engine Misfires Or Has Lack Of Power
- Verify air filter is clean.
- Check fuel filter for restriction.
- Check closed throttle position switch
- Check coil resistance.
- Check mass airflow sensor for cracks.
- Check EGR valve and solenoid for correct operation (if equipped).
- Ensure fuel system pressure is correct.
- Check purge control valve operation.
- Check atmospheric pressure sensor.
- Check ignition system for intermittent operation.
- Check for restricted catalytic converter.
- Check Variable Resonance Induction System (VRIS) for correct operation (if equipped).
- Check Variable Inertia Charge System (VICS) for correct operation (if equipped).
- Check crankshaft position sensor.
- Check turbocharger or supercharger system (if equipped) for wear or malfunctioning parts. Turbo system inspection should include the following: - Turbo Precontrol. - Wastegate Control. - Turbo Control. - Charge Control. - Charge Relief.