Hi All newbie here, I have a 95 325is coupe with a strange engine noise. doesn't sound serious. ( not a valve noise its more like a fuel injection noise ) sounds like a soft dook dook dook as the engine idles. I am trying to sell it and when I show it the people ask about it, I thought it was a normal sound of the fuel injection. I have had other cars that has this sound (Subaru's). I didn't think it was a big deal. Please advise! Thanks in Advance!