The kocking nosie coming from my car has finally be located and I need a little advice. It only knock's when the ac is on and only at low rpms. I dunno if this is the ac's compressor bearings going out or if it is actually within the block its self. Can some one give me advice?

 

Are you sure it's not just the AC compressor being engaged? Do you have a aldl cable and anyway to monitor the car with Freescan? That would tell you if you are getting any knock retard (because the car is detonating).

 

no i don;t have the cable or a way to monitor it freescan. So what should I do?

 

And it's not just the AC being ingauged I don't tihnk because would that just stop once turned on? This seams to fade in an out