Jimmy P

iTrader: (177)

I had the Eaton differential in my 12 bolt replaced with a TruTrack, and had the stock fuel pump replaced with a Walbro 255. I am trying to figure out what this sound is. At idle it seems normal to me. But as soon as the rpms get at 2000 or so I can hear this sound coming from the back. At first I thoguht it was coming from the new differential. But I found that weird as I have heard the trutracks are quiet. I am wondering if it is coming from the new fuel pump? Any ideas? The sound just kicks in when the rpms get up there. thanks

onfire

iTrader: (17)

If you rev up to 2000 while not moving do you hear it?

orangeapeel

iTrader: (18)

I am having the same issue right now. but I know that it is the fuel pump.