Ok I couldn't just scrap 2 years worth of work so ... I have the rails off new injectors in check the fuel pressure hit the key and it jumps right to 44lbs, then drops fast nothing coming out of the injectors nothing coming out of the pressure reagulator vacuum port, so I onhooked my return and put in a can nothing there either, so I hit it again and clamped off the inlet , bingo .. Does not drop a pound think the pump which is brand new by the way is letting the fuel back into the cell ??? On the same note should I vent the fuel cell ?

 

The pump has an internal check valve. It can definately go bad. Good troubleshooting. I don't think this would cause your over fueling problem though. I bet you need a new tune on your PROM.