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[resolved] Fuel pressure drop in boost

Posted by Boostedjesus, Sep 25, 2020

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  1. Boostedjesus

    Boostedjesus Probationary Member

    Joined Mar 5, 2020
    Paso Robles, California
    So ive been battling a fuel pressure drop for a while, I finally started going thru items to test and check and I finally got it resolved!

    i started by logging fuel pressure with link thru the factory MDP plug. Just a ebay 0-100psi sensor.

    -changed my walbro 450 to a walbro 525 without check valve
    -did the fuel siphon mod(2g gsx) 1/8” drill bit
    -6an bulk head fitting with -6an line with adapter to oem hard line.
    -tested the diaphragm on the afpr and opened it up and cleaned it.
    -redid vacuum line straight from manifold to afpr
    -replaced the relay for the rewire kit

    and after everything i was still having a fuel pressure drop in boost. I finally decided to check my (aeromotive) fuel filter and it was a paper style and was old/dirty so i ordered a replacement micro glass filter cartridge and instantly my fuel base pressure climbed and no more fuel pressure loss in boost. So before going thru the headache of running a bulk head all the other little things everything check your fuel filter first.

    Attached Files:

    Street Build 335  5

    1995 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

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