Have a 1995 ford f150 5.8. Truck has low fuel pressure (17psi at idle). It has an 18gal after axle steel tank and a 17 gal midship steel tank. I'm assuming the after axle tank pumps into the midship tank and the midship pumps to the engine? So this would mean it is the midship tank fuel pump that is bad? Thanks
Country: United StatesMake: FordModel: F150 Pickup 4x4Year: 1995Engine: 5.8
Fuel Pressure Test
Hello and Welcome to Justanswer, My name is XXXXX XXXXX X am here to try and assist your with your question.Both in tank pumps have a built in check valve. Which tank pump is doing what?Will it run on of eaither tank?
Did not know I could isolate each tank. This is a friends truck. Is there a fuel tank switch somewhere?
The switch is on the dash and each pump works independent from each other, in other words, if you have it on the rear tank it draws from the rear tank and vise versa. If the rear tank is pumping the return fuel into the front tank then the front tankpump is bad because the check valve is not holding. Normal fuel pressure needs to be 32 to 45 on each tank pump.
23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs