Not sure if this is in the right forum but my 1998 v6 mustang has a tapping noise coming from the fuel lines. Yes the noise is coming from somewhere inside the lines and if you place your hand over the lines themselves you can feel them pulsing. Has anyone had this problem and if you have has if been fixed? Also a little extra sometimes after the car has been driven a while my car needs to be primes a few times to start, is this solely a bad fuel pump or other things?