Acts like it is not getting enough fuel when going up hills. have replaced fuel filter but still having trouble. 2000 Ford Expedition 5.4l engine

Check fuel pressure pump is prob going out

Feed (spay) some gas from intake to see if you can keep engine running. If so, then either fuel pump or filter is aged.

Check the fuel pressure before the filter and after the filter to determine which one is the problem.

Do you have a fuel pump? If its bad or weak, you aren't getting enough gas to your engine. Has anyone thought of the filter in your gas tank?

check fuel psi.
should be 30-45 psi
key on engine off

fuel pump? it is running lean (not enough fuel) or a leak in evap

Sounds like it could be a weak fuel pump.Check your fuel pressure it should be 30-45 psi.

CHECK OIL PRESSURE SHOULD BE 20 - 45 PSI @1500 RPM OR 40 - 70 PSI @1500 WHEN ENGINE RUN ROUGH OIL LIGHT COMES ON YOUR OIL LEVEL LOW OR OIL TOO CONTAMINATED.YOU NEED TO CHANGE OIL FILTER AND OIL.LOOK AT THE COLOR OF THE ENGINE OIL,LOOK MILKY COOLANT GETTING INTO OIL.SMELL OIL IF SMELL LIKE GAS FUEL INJECTORS DIRTY CAUSING FUEL TO LEAK DOWN INTAKE WHEN ENGINE OFF.

You most likely have a fuel pump going out,the fuel filter replacement was a little late,it put strain on the fuel pump,and it has took it`s toll on the fuel pump,,I have seen it a lot,if this was helpful,at all,please rate,thank you,and have the fuel pump pressure checked.

Has the Maf sensor been chk'd? It controls the fuel. If the engine doesn't run proper, the transmission will act up. The maf sensor is located as the first sensor coming out of the air clraner. Inexpensive, easy replace fix. Good luck

if u are getting a fault code saying it is the air flow sensor u need to replace it a reset the computer memory

the airflow sensor is between the throtle body and the the filter

once u have done that road test truck and check codes again

let me know how u went