I just went out and scoped it. It seriously is coming from the fuel rail lol. Put it up to the valve covers nothing out of the ordinary. Put it up to the charger, same. Put it up to the rail, thuck thuck thuck. I have not the slightest clue. Soes this make any sense? Also the vacumm modulater behind the charger (plugs into the tb) is pulseating. Like tink tink tink.
Just went outside. ...... More then a good possiblily it is the pvc valve. That is the area the noise is coming from and i can hear it with the scope there. So what would be wrong.... just a new pvc valve?