Dropping fuel pressure under boost... help
03-16-2008, 06:24 PM
#1
12 Second Club
Thread Starter
iTrader: (4)
Join Date: Feb 2004
Location: Katy, Tx.
Posts: 630
Likes: 0
Received 0 Likes
on
0 Posts
Dropping fuel pressure under boost... help Ok here is my setup.
2 walbros in the gas tank Yed in together.
An APS Fuel pressure ragulator (boost oriented)
Racetronics fuel pump wiring harness kit
65# injectors...
I have checked for leaks (multiple times), none
I have removed the APF F/P regulator and gone back to stock and i still dropps under boost.
Replaced the fuel filter.
I have turned the F/P up to 100 PSI (just letting it idle) still no leaks
However when I go into boost the F/P starts dropping....
Thoughts?
2 walbros in the gas tank Yed in together.
An APS Fuel pressure ragulator (boost oriented)
Racetronics fuel pump wiring harness kit
65# injectors...
I have checked for leaks (multiple times), none
I have removed the APF F/P regulator and gone back to stock and i still dropps under boost.
Replaced the fuel filter.
I have turned the F/P up to 100 PSI (just letting it idle) still no leaks
However when I go into boost the F/P starts dropping....
Thoughts?
03-16-2008, 06:32 PM
#3
12 Second Club
Thread Starter
iTrader: (4)
Join Date: Feb 2004
Location: Katy, Tx.
Posts: 630
Likes: 0
Received 0 Likes
on
0 Posts
3/8's
My reading (gauge) is being taken from the opposite side of the fuel rail from where it's being feed from.
PS I have not changed the setup, I ran this setup with no issues for 6 months, this is something new and I can't figure out why it's doing it now....
My reading (gauge) is being taken from the opposite side of the fuel rail from where it's being feed from.
PS I have not changed the setup, I ran this setup with no issues for 6 months, this is something new and I can't figure out why it's doing it now....
Last edited by Linxs; 03-16-2008 at 06:38 PM.
03-16-2008, 07:50 PM
#5
1 of the pumps is either bad or cutting out under higher RPM....i JUST went through this problem.i pulled both pumps and test each 1 to a power and ground and they sounded the same and both flowed fuel.....BUT repeatedly tap the power wire giving it power 1 of them sounded different and was bad.
03-17-2008, 04:54 AM
#7
12 Second Club
Thread Starter
iTrader: (4)
Join Date: Feb 2004
Location: Katy, Tx.
Posts: 630
Likes: 0
Received 0 Likes
on
0 Posts
1 of the pumps is either bad or cutting out under higher RPM....i JUST went through this problem.i pulled both pumps and test each 1 to a power and ground and they sounded the same and both flowed fuel.....BUT repeatedly tap the power wire giving it power 1 of them sounded different and was bad.
Thanks, I was leaning this way!
