I installed the Mitusa lift pump on my truck along with a trippin pick-up back in the spring. My truck would run out of fuel at a quarter tank, limiting my travel time, and flat p1ssing me off.

During the off season, I unhooked the pump to see if it was a pickup problem or pump sucking too much fuel out of the bowl.

Truck ran down past empty with pump unhooked, "O.K. it's the pump". I then hooked the pump back up and removed the Mitusa return line from the filler neck and plumbed into the 1/2" fuel supply line coming from the tank. Problem solved, thanks 1000hp for the suggestion. Fuel pressure didn't increase either

Most likely work for the FASS problem also.

Thought I'd post findings.

Take care,
Rob

I installed the Mitusa lift pump on my truck along with a trippin pick-up back in the spring. My truck would run out of fuel at a quarter tank, limiting my travel time, and flat p1ssing me off.

During the off season, I unhooked the pump to see if it was a pickup problem or pump sucking too much fuel out of the bowl.

Truck ran down past empty with pump unhooked, "O.K. it's the pump". I then hooked the pump back up and removed the Mitusa return line from the filler neck and plumbed into the 1/2" fuel supply line coming from the tank. Problem solved, thanks 1000hp for the suggestion. Fuel pressure didn't increase either

Most likely work for the FASS problem also.

Thought I'd post findings.

Take care,
Rob

Where on the supply line did you tie in at? could you do it near the motor?

I havent had any lay down or run out of fuel like that you describe. However I dont like leting it run low on fuel as this new fuel has a lot of garbage to it ! I have noticed with dual cp3 The return in the neck has seemed like it has slowed a bit but when reved it pours out like it should . Could be the return being tied into the stock pump lessening the overall amount to the MITUSA !