BBB
Registered User
I installed a fuel pressure guage at the filter head. It runs around 5psi at idle and light throttle, at full throttle it drops to 0 or near 0. Any thoughts. I am thinking it would be a good time to do a electric pump
The motorcraft lift pump I got reads 4-5psi at all RPMs and loads, that is how they should be. I hooked up a pressure gauge and verified this pulling hills and such not just revving in the driveway.i dont suggest running a electric and mechanical.
honestly it sounds like you pump is absolutely perfect dont change it. that is exactly what every good pump i have tested ran at. I honestly wouldnt worry about it, run it!