Lack Of Power
- Inspect induction system. Inspect for air leaks downstream of throttle valve. Inspect duct between mass airflow sensor (if equipped) and throttle body.
- Inspect throttle valve for binding and proper adjustment. Ensure throttle valve opens completely.
- Verify fuel pump is okay. Check fuel pressure and pressure regulator. Inspect for leaks or restrictions in fuel line. Check fuel filter.
- Check injector operation by individually unplugging connectors. Engine RPM should drop noticeably. Check opening duration. Inspect injectors for leaks.
- Check Manifold Absolute Pressure (MAP) sensor (if equipped).
- Verify mass airflow sensor filament is not broken and burn-off function is working (if equipped).
- Check turbo and Automatic Performance Control (APC) systems for proper operation.
- Check coolant temperature sensor operation.
- Check intake air temperature sensor operation.
- Ensure electrical harness, connectors, and wires are not broken or loose. Check all input signals to ECM.