Lack of Power, Sluggishness or Sponginess (Except LTG)
WARNING: This page is about a different variant/trim than selected.
- Inspect the engine electrical system for incorrect operation. Refer to Symptoms - Engine Electrical .
- Verify that each injector harness is connected to the correct injector.
- Inspect the mass air flow (MAF) sensor for obstruction, contamination and damage. Refer to Mass Airflow Sensor with Intake Air Temperature Sensor Replacement .
- Engine warm and idling, verify the correct operation of the camshaft actuator system. Command the intake and exhaust camshaft actuators from 0 degrees to 20 degrees and back to zero while observing the scan tool Intake Camshaft Position Variance and Exhaust Camshaft Position Variance parameters. Each parameter should be less than 2 degrees in each of the commanded states.NOTE: The following actions may need to be repeated in order to verify an intermittent intake or exhaust camshaft actuator condition.
- If any of the parameters is greater than 2 degrees, inspect the suspect camshaft actuator and camshaft actuator solenoid valve and valve bore for contamination, obstruction and damage. Refer to Camshaft Position Actuator Exhaust Solenoid Valve Replacement , Camshaft Position Actuator Intake Solenoid Valve Replacement and Camshaft Actuator System Description .