I finally bought a fuel pressure gauge. Did the test on 94 4.9 dual tanks.


koeo 55psi on both tanks
koer 40-45 psi on both tanks
bleed down time of 5 min still holds 55 psi on both tanks
replaced bad fuel pressure regulator noticed after replacement cross filling from front to rear and now front pump is screaming from the looks of things I need to replace both pumps. I think....