On the tank there are a few lines, I assume its fuel injected? You have a supply line to the rails, you have a return line to the tank, you have the filler neck, (now the gas cap plays a part in the venting as well) and you have a breather vent line that goes to a charcoal canister to vapor the fumes, my first step would be to loosen my filler cap allow the tank to recieve air. Some tanks have another tube that runs up next to the filler tube which also vents, I would trace lines and seek their locations, also inspect for collapsed line. Two to the motor and your other is the breather. Once locate un hook and blow compressed air into and check that it goes in tank by sound if not its plugged or collapsed. Hope this helps you i'll see if I can find a diag for you.
Monday, January 10th, 2011 AT 10:53 AM