Supercharger Noisy
- Air or vacuum leaks. Check hoses, tubes and flange joints for leaks.
- Exhaust leaks. Check rubber tube to EGR valve for looseness and damage.
- By-pass actuator not opening. Check by-pass vacuum tube for damage, restriction and incorrect routing. Check valve and actuator rod for restriction. Ensure actuator rod rests against lever stop when vacuum is less than 3 in. Hg. Actuator rod should be fully open (horizontal) when vacuum is greater than 8 in. Hg.
- Low supercharger oil level. Replace supercharger if no oil is present.
- Contaminated supercharger. Remove outlet adapter. Inspect rotors for foreign objects. Replace supercharger if rotors are damaged.
- Gear rattle is normal and does not affect performance. Excessive gear rattle can be caused by actuator valve not opening.
- Chirping is normal and does not affect performance. Excessive chirping can be caused by actuator valve not opening.