For 1990-2009 cars

Problem | Action
--- | ---
Inadequate air supply to the actuator |

• | Inspect the air connections.

• | Inspect the available air pressure.

Damaged actuator return spring | Replace the actuator. Refer to Engine Brake Replacement .
Damaged actuator piston | Replace the actuator. Refer to Engine Brake Replacement .
Damaged ball joint | Replace the ball joint. Refer to Engine Brake Replacement .
Excessive carbon buildup |

1. Remove the exhaust brake. Refer to Engine Brake Replacement .
2. Clean the bore and the butterfly.