cjg454ss

iTrader: (27)

I have a turbo setup with a fuel issure.i have an autometer electric fuel guage. my pressure is set at 60psi, it will stay there sometimes. then i shut the car off and it will go to 70psi and sometimes more, sometimes it will sit on 40psi. its just isnt consistant.. i have 2 walbros, wired on all the time, -8 feed, -6 returns, aeromotice rails and proseries regulator. anyone have a though of what this is.

Shoaf85

iTrader: (9)

Does it stay steady while it is running and only fluctuate when the car is tuned off or what? If it is actually changing pressure on each start up then I would check your wiring/relay/gounds etc. Maybe check for fuel leaks with the linse inside the tank.

veee8

iTrader: (40)

If it is like my autometer electric pressure gauge, when you turn off the ignition, the gauge is off and not reading anymore. The sending unit, gets its power from the gauge, so I don't think the number you are seeing is factual.

cjg454ss

iTrader: (27)

no its different when the ignition is on and the guage has power. i did blow a line in the tank before and replaced it. i just did a test

key on 60psi,
started motor 60psi
engine off key on 70psi
key on again running 40psi.

im stumped,

cjg454ss

iTrader: (27)

it also stays when running at a set pressure. it might be 40psi or 70 psi.

veee8

iTrader: (40)

What fuel pressure gauge? It might be a bad sending unit.

cjg454ss

iTrader: (27)

autometer ultra light, im going to put a mechanical on the rail to see what it is for sure. that will let me know if it is pump or sending unit.

vandal0-0

iTrader: (3)

Is It possible that one of the pumps Is bleeding off.

cjg454ss

iTrader: (27)

probably, anyone else have a similar issue?

Lonnies Performance

iTrader: (16)

I would get another test gauge to be sure the reading is correct.

If it is correct, then I would suspect the regulator.