1993 Ford f250 5.0L no fuel pressure ,
I replaced the fuel pumps, fuel tanks, fuel filter and fuel regulator in both tanks. I can start the truck with fuel on a rag and she purrs like a kitten. When trying to start it she gets no pressure showing on the fuel rail. I am completely stumped on where to go next. When l push the button on the rail it will bubble and spit fuel and air out but will not build pressure. The truck acts like it wants to start but falls on her face. Any advice would greatly appreciated!

 

Under the dash, just over the tunnel over the trans, against the firewall should be an inertia sw. check it and make sure it is depressed all the way down..

 

Thank you...We found the inertia switch it is depressed down and it checks out as good. I replaced the switch and both pumps kick on but do not build pressure . Both pumps were replaced new but l did use Amazon pumps

 

Two things to make your day.


Do you know what brand of fuel pumps you received?

You may need to drop the tank and remove the fuel pump module.You will be looking for a hole or an opening where pressure from a hopefully good pump is going right back to the tank. There is usually a clear plastic tube from the pump up to the outlet of the tank. It could have a serious leak there. If that is the case you will need to replace the entire fuel pump module assy. You might want to be sitting down when you get the cost of that module.