Yes the injectors have a slight tick to them. What I do is take a short piece of garden hose and use it holding one end to my ear to try and isolate where the sound is coming from. I just replaced my AC idler pulley but I thought it was the power steering pump it was a combo of ticking and whining.
Recently ran the pump dry due to a pressure line leak and picked up an AC idler pulley and bracket from the yard cause my bracket was rusted and too hard to adjust. I went ahead and used the pulley that was on it and threw mine away. I thought the pump was damaged but after using the hose trick found out it was the idler I picked up at the yard. Replaced it with a new one, runs extremely quiet now.
Last edited by avenge; 08-07-2009 at 09:59 PM.