SARD FPR pressure drops
#1
Honda-Tech Member
Thread Starter
Join Date: Oct 2007
Posts: 259
Likes: 0
Received 0 Likes
on
0 Posts
SARD FPR pressure drops
Guys I bought a sard fpr and I am wondering if there is a problem with it.
When I turn on the key "do not start it" the pressure goes up on my gauge but quickly drops. I noticed a lot of the fuel exits the return line back to the tank. Is this normal? I am getting ready to start my engine for the first time since I installed my Jackson supercharger and wanted to be sure this would not be a issue first.
When I turn on the key "do not start it" the pressure goes up on my gauge but quickly drops. I noticed a lot of the fuel exits the return line back to the tank. Is this normal? I am getting ready to start my engine for the first time since I installed my Jackson supercharger and wanted to be sure this would not be a issue first.
#3
Honda-Tech Member
Thread Starter
Join Date: Oct 2007
Posts: 259
Likes: 0
Received 0 Likes
on
0 Posts
Re: SARD FPR pressure drops
I am thinking its a bad regulator, its leaking gas at a high rate out of the "drain back" return fitting. I bought this regulator used so its possible its bad.
#4
Honda-Tech Member
Re: SARD FPR pressure drops
Unless the pump is constantly running, then yes, pressure is going to drop when the pump turns off...I believe there is a check valve built into the pump to keep the fuel from draining all the way back to the tank, but the return line should be unrestricted.
To test the fuel pressure regulator, record the fuel pressure a idle. Then crimp the vacuum line going to the FPR. Fuel pressure should rise since no vacuum is being applied (simulating WOT).
Is it possible the FPR is adjusted incorrectly? (too low letting too much fuel bypass)
Possible failing check valve in the pump?
To test the fuel pressure regulator, record the fuel pressure a idle. Then crimp the vacuum line going to the FPR. Fuel pressure should rise since no vacuum is being applied (simulating WOT).
Is it possible the FPR is adjusted incorrectly? (too low letting too much fuel bypass)
Possible failing check valve in the pump?
#5
Keyboard Humorist
Join Date: May 2002
Location: Granada Hills, Ca, USA
Posts: 9,814
Likes: 0
Received 9 Likes
on
7 Posts
Re: SARD FPR pressure drops
Is it even supposed to hold pressure after the prime and pump off?
I know that's how a standard regulator works - so it does seem odd that yours is dropping off.
Prime with the return crimped and it should hold pressure.
I know that's how a standard regulator works - so it does seem odd that yours is dropping off.
Prime with the return crimped and it should hold pressure.
Trending Topics
#9
Honda-Tech Member
Thread Starter
Join Date: Oct 2007
Posts: 259
Likes: 0
Received 0 Likes
on
0 Posts
Re: SARD FPR pressure drops
#10
Honda-Tech Member
Re: SARD FPR pressure drops
My aem fpr act the same way. I just have to let it prime once before staring my car due to the fuel pressure drop. That was one problem I hated about it. Other than that it work good for me being that way.
#11
Honda-Tech Member
Re: SARD FPR pressure drops
Is that the exact one you have?
Does the sticker on yours say 200~800kpa?
That converts to a range of 29psi to 116psi.
#12
Honda-Tech Member
Thread Starter
Join Date: Oct 2007
Posts: 259
Likes: 0
Received 0 Likes
on
0 Posts
Re: SARD FPR pressure drops
Is that the exact one you have?
Does the sticker on yours say 200~800kpa?
That converts to a range of 29psi to 116psi.
yes its is, genuine sard
Thread
Thread Starter
Forum
Replies
Last Post
m R g S r
Forced Induction
10
08-31-2005 01:30 PM