I also have the 255lph in-line pump. My Magnavolt (older version) is wired to that. At 3psi the hobbs switch activates the voltage booster (Magnavolt/Kenne Bell BAP). I hooked up a multimeter to the 12v/ground leads on the magnavolt and ran them into the truck. Then I went for a spin to make sure at 3psi the voltage did indeed increase. Have you done something like that to ensure the Magnavolt is coming on?

Of course a new FPR would be an easy fix, maybe you'll get lucky and thats all it is.

 

BINGO! thats my guess too. seeing that we have the EXACT same fuel systems, why would your pressure be so much better than mine?

 

no, i have not done this. since the magnavolt did nothing for my fuel pressure issue, i removed it. i can put it back on, but i lost the directions i got from Tony over the phone that i wrote down, so now i can't remember where all the wires go. i know Red is power from batter, black is chassis ground, then i have a yellow, white, and grey wires. i think the yellow is for fuel pump + and grey is for ?, white is for RPM signal. where is the best place to tap in for the white wire? the yellow and grey are under the fuse box (if i remember correctly?).

 

http://www.magnacharger.com/pdf/manu...umpbooster.pdf

My in-line pump helped a little but when I put the voltage booster on there my FP was rock solid at 62psi all the way up to 6400rpm @ 130mph (on the dyno of course) I think I would double check that it was hooked up right and working before I dig too much further. Could have had a bad ground, defective unit etc..and not know it.

 

anyone with an 04+ truck with a return fuel system have fuel press drop at wot??

 

qood question, anybody?

can we please keep this thread "on-topic" and discuss only return fuel systems. not returnless. thanks.

 

UPDATE: i've ordered a new in-tank OEM fuel pump, a new 255lph walbro in-line pump, OEM FPR, and OEM fuel filter. I'm gonna change it all out on tuesday next week. we'll see what happens from there.

 

Good deal Holty...I still have a sneaking suspicion that its your OEM fuel pump going bad or just faulty. I may be wrong...but its just my thought.

 

yeh, i agree. HOWEVER, did holty say this has always been a problem since day 1 of the raidx install? If so, cough cough FPR o-ring cough cough. Nice thing about replacing all the items, it should be fixed. Bad thing, $.

 

yes, but it saves a lot of headaches, and he said as soon as you get a chance you can just shoot him over the cash via Paypal.