Im trying to find out if my fuel pump is the cause to my problems.

I lose power at WOT

when i spray the 150 wet kit it feels as if it has none to little effect. This has been getting worse and worse for a few weeks.

I tested the fuel pressure with a guage. At idle initially it was 39 then with the vacumm line off the pressure regulator it was 45(to simulate WOT).

I let it run a bit because my problem with power seems to come a minute into the ride.

2 minutes passed and the fuel pressure at idle was 36-37. Then at simulated WOT it was 44.

I then tested fuel pressure during cruise rpms at 3k rpms it was 34-35 psi


Sounds like a fuel pump going bad but i know nothing about this so im asking anyone thats been through this or has some expertise to clue me in here.

 

You have to measure the fuel pressure at WOT, max load/max RPM. Testing it at idle or under part load/cruise conditions doesn't prove the pump can support max engine load. It should be able to hold within 2psi of the "no vacuum" reading at WOT.