DVS BSTD

iTrader: (3)

1998 Camaro return style vette rail...I changed over to a walbro 450lph pump.. now I'm getting fuel pressure to the rail but none getting by the regulator.

Bought a new regulator..no change.


Any insight? Anyone else had this problem I've searched but came up with nothing.

DVS BSTD

iTrader: (3)

No one ever had this issue? Does it take a certain amount of pressure to get through the regulator?

chrysler kid

iTrader: (14)

Regulator is in tank on all fbody applications. There was a rumor that late 97 production ls1 fbodies used in pre development testing had regulators on the fuel rail. Companies received the pre production 98 models for testing and made products according to that vehicle. Companies like typhoon advertise a 98 needs a special fuel rail with a new regulator however it does not

Even my Dec 97 trans am had no fpr.

So you're not suppose to have a regulator like a vette does

DVS BSTD

iTrader: (3)

Well for whatever reason mine doesn't have an in tank regulator it has the return style 97 Vette rail and has had that setup since I bought the car 3 years ago...this issue has me puzzled...I can pull the regulator and prime the pump and fuel shoots everywhere...put regulator back in and nothing gets past it.

jrpimp00

iTrader: (17)

pics would help a lot. Is the pump the only change you made? Like stated above FPR is in the tank on a 98

chrysler kid

iTrader: (14)

The fpr would need to be connected to a vacuum source to open.

Is your fpr connect to an engine vacuum line?

https://ls1tech.com/forums/fueling-i...regulator.html

Vette rail with fpr





The only pump I would use in my 98 is the race tronix. The 98 pumps and hangers are very delicate


Fbody pressure regulator (to note the pump below is a 99+ which is collapseable. The 98 hanger assembly bends and twists into the tank)

joecar

This tells me that your regulator is leaking (stuck open) which relieves pressure into the the return line so you see no pressure at schrader valve.