slight squeaking sound at start up

[san rensho]

Originally Posted by kk2002s

Hate to ruin a good nights sleep. The air injector is one sound that is expected but there is a bearing in it that can go bad. I'm starting to hear a very high pitch squeal while the injector is running. So I suspect that the bearing that the injector runs on is going bad

Yep, eventually it will start throwing codes. Theres a write up over on rennlist on how take the pump apart and lubricate the bearing that goes bad.