Fuel Pump Problems

[TraV8]

So about 3 months ago i did an eaton swap on my 04 MM. For the past about 3 weeks i have gradual seen a power loss get worse. I hooked a fuel presure gauge to my fuel rail and keyed the car, it jumped up to 15 psi, i keyed the car a few more times and the psi stopped at 25psi.

When i did the Build i installed an Aeromotive 340 fuel pump. i did replace all the fuel lines in the tank.
What could this be??? Fuel pump bad already or FPDM??:help:

[Zack]

Bad pump or a split in one of the lines.

Some will say fuel filter, but highly doubtful.

[Zack]

Get a reading when the car is running.

[fastblackmerc]

Bad pump or a split in one of the lines.

Some will say fuel filter, but highly doubtful.

If you don't know when the filter was replaced I'd do it. Cheapest & easiest possible fix.


Get a reading when the car is running.

+1 on a reading when running.

[TraV8]

I will have to get back to you on the fuel pressure when car is running.
the car will start run and drive fine. I will only notice problems if 1/3 throttle or more.

[TraV8]

i already replaced the fuel filter not the problem :(