nasty_ss

i recently installed holley rails and dual walbros for my turbo setup and went with an aeromotive adj boost ref fpr. question is when i turn the key before i start the car to prime the line it's bleeds back down to 0 pressure almost immediate after pumps shut off. is this normal or should it just hold pressure? at least for a minute or so?

JoshuaGrooms83

iTrader: (2)

id image that without the engine running that it will bleed back within seconds since its a return system now. im not 100% sure. Are you seeing constant pressure with the engine running?

98Camarod

iTrader: (43)

Mine immediately goes to 0 as well. -10 feed, -8 return

Somebody09

it was a "return system" before, too, just maybe not adjustable and at the rails. maybe 0 psi is normal, but I find it odd. the regulator is only supposed to return any (and all) pressure above what you set it at. so if your pump pushes enough volume to where the regulator sees 80 psi, but you only wanted 58 psi, then 22 psi bleeds over into the return line... at least thats my understanding

Lonnies Performance

iTrader: (16)

The bleed rate is determined by how well the regulator seals or if there are any leaks in the system.

It may not hold pressure for a long time, but should not fall to zero in just a few seconds.

TX RED

iTrader: (19)

same here takes about 3-5 secs to zero

98Camarod

iTrader: (43)

Where would the leaks in the system be to cause it? I know several people that have the same thing happening. I thought it was normal as well.

Lonnies Performance

iTrader: (16)

Typically the lines inside the tank, or you can have a junk regulator.

MIGHTYMOUSE

iTrader: (59)

can open the regulator and normally spot the issue if there is one.

if there isnt one then you need to look in the tank for a blown hose

Old Geezer

iTrader: (3)

Check valve in one, [or both] of the pumps not sealing. [If so equipped].

98Camarod

iTrader: (43)

I don't have any hoses in my tank. I opened the regulator when I first got it and didn't see anything that looked wrong with it. I've got a magnafuel 4303 for fuel delivery.

Lonnies Performance

iTrader: (16)

When you give all the details, it is easy to diagnose....

The 4303 does not have a check valve. Add one to the supply line if you want it to hold pressure.

As for the original post, please check the above listed items.