Fuel pressure drop

[00PRIXGTP]

Hello everyone,
I have a 00 GTP that is loosing fuel pressure, starts in the upper 40's and drops to 0 in 30 to 45 sec.
Has new pump and filter, injectors test at 12 ohms, fuel reg test good. both relays test good.
has anyone come across this before?
any ideas would help, thanks so much everyone.
Have a great New Year!

 

[Scottydoggs]

it dropping car running? or after its turned off?

 

[00PRIXGTP]

running,
but same with key on eng. off

 

[00PRIXGTP]

running and koeo

 

[Scottydoggs]

does it drive ok? or is it stalling out on ya? they need 42 or more to run.

if it runs id test the gauge on another car, maybe its bad.

 

[00PRIXGTP]

I belive I have found the problem
The relay on the frame rail is bad
No one has one around here not even the dealer
Waiting till Tuesday until it comes in.
The car would start and stall, I bought a weak fuel pump too I only have 42 psi.
But I have the fuel pump in high and it's running know. Thanks for the help though.
Hopefully this relay I'm waiting on will fix it
Let you know Next week. Have a great and safe new year

 

[ItHurtz]

resistor? no need to run it, twist the wires together and go about your day.

 

[Scottydoggs]

do this.