Engine Lacks Power
- Ensure throttle valve opens completely when accelerator pedal is fully depressed.
- Ensure air intake system is unrestricted.
- Check deceleration fuel shut-off valve operation (1.8L turbo).
- Check Mass Airflow (MAF) sensor.
- Check intake manifold change-over valve.
- Ensure fuel system pressure and volume are correct.
- Ensure base timing is correct and timing advance system is functional.
- Check turbocharger operation.
- Check Engine Coolant Temperature (ECT) sensor operation.
- Check transmission for correct downshift (A/T).
- Check fuel tank filler tube for tampering of restrictor. If tampering has occurred, check catalytic converter for lead contamination and exhaust system restriction.
- Check for poor quality fuel containing insufficient cleaning additives.
NOTE:
Prolonged use of poor quality fuel can cause injector clogging and carbon build-up on intake system.