7.4gi fuel pressure specs….

[Lukeoforcas]

Anyone? Anyone?
My low side is less than 10psi cold start. High side is 40ish. Having hard hot restart and running lean for a minute while applying power. Then clears up.

[bruceb58]

Throttle body or MFI?

[Lukeoforcas]

Mfi

[bruceb58]

Mfi

the spec for low is 8 and high is 50 to 60

[glenncal1]

Check the fuel pressure regulator. Had to do that on a 7.4 merc mpi. In my case the pressure was too high causing other problems. Fairly easy swap out.

[Lukeoforcas]

Seems like I saw somewhere on here that somebody found a Bosch part number for the regulator. So one wouldn’t have to buy that super expensive blue box.