Returnless question
Thread Starter
Joined: Aug 2004
Posts: 5,433
From: Montreal, Qc, Canada
Returnless question
My adjustable FPR has three outlets. Two of them the line coming from the Tank\Filter simly passes through it, then at the bottom there is a third that says RETURN.
So I ran the Return line to a Tee to the real (stock) return line. But the only way we get correct Fuel pressure is by pinching the line between the end of the fuel rail and the Tee.
So should I simply block off the 2nd end of the rail like on 2k2s? And get rid of the Tee at all.
So I ran the Return line to a Tee to the real (stock) return line. But the only way we get correct Fuel pressure is by pinching the line between the end of the fuel rail and the Tee.
So should I simply block off the 2nd end of the rail like on 2k2s? And get rid of the Tee at all.
The way most people have a "returnless" hooked up:
1. Run a line FROM the fuel filter to the fuel rail
2. Insert a T in this line
3. Run a hose from the 3rd leg of that T to the INLET of your FPR
4. Connect the stock return line to the outlet of your FPR.
And yes the front part of the rail should be blocked off, just like a stock 2k2-2k3 rail.
1. Run a line FROM the fuel filter to the fuel rail
2. Insert a T in this line
3. Run a hose from the 3rd leg of that T to the INLET of your FPR
4. Connect the stock return line to the outlet of your FPR.
And yes the front part of the rail should be blocked off, just like a stock 2k2-2k3 rail.
Originally Posted by Nismo3112
The way most people have a "returnless" hooked up:
1. Run a line FROM the fuel filter to the fuel rail
2. Insert a T in this line
3. Run a hose from the 3rd leg of that T to the INLET of your FPR
4. Connect the stock return line to the outlet of your FPR.
And yes the front part of the rail should be blocked off, just like a stock 2k2-2k3 rail.
1. Run a line FROM the fuel filter to the fuel rail
2. Insert a T in this line
3. Run a hose from the 3rd leg of that T to the INLET of your FPR
4. Connect the stock return line to the outlet of your FPR.
And yes the front part of the rail should be blocked off, just like a stock 2k2-2k3 rail.
I think you're misunderstanding his question. He has a FPR with THREE ports in it, not two.
JClaw, what kind of FPR is it?
Thread Starter
Joined: Aug 2004
Posts: 5,433
From: Montreal, Qc, Canada
Performance something... I forgot. We hooked it up as I said with the 2nd end of the fuel rail BLOCKED and it seems to idle and run fine. It sees roughly 49-51 psi pretty constantly.
Basically my FPR has the 2 outlets for the fuel coming in (IN and OUT), and it rejects the excess fuel by the 3rd outlet (RETURN). So technically once the fuel leaves the FPR for the fuel rail, it is the 100% correct amount so having the second end of the rail block should (in theory) be fine.
I chopped the line between the fuel filter and the fuel rail and installed the FPR there. Then plugged the original Return line to the 3rd outlet of the FPR, and blocked off the 2nd end of the fuel rail.
Thats how I understand it let me know if I got anything wrong.
Basically my FPR has the 2 outlets for the fuel coming in (IN and OUT), and it rejects the excess fuel by the 3rd outlet (RETURN). So technically once the fuel leaves the FPR for the fuel rail, it is the 100% correct amount so having the second end of the rail block should (in theory) be fine.
I chopped the line between the fuel filter and the fuel rail and installed the FPR there. Then plugged the original Return line to the 3rd outlet of the FPR, and blocked off the 2nd end of the fuel rail.
Thats how I understand it let me know if I got anything wrong.
Originally Posted by JClaw
Performance something... I forgot. We hooked it up as I said with the 2nd end of the fuel rail BLOCKED and it seems to idle and run fine. It sees roughly 49-51 psi pretty constantly.
Basically my FPR has the 2 outlets for the fuel coming in (IN and OUT), and it rejects the excess fuel by the 3rd outlet (RETURN). So technically once the fuel leaves the FPR for the fuel rail, it is the 100% correct amount so having the second end of the rail block should (in theory) be fine.
I chopped the line between the fuel filter and the fuel rail and installed the FPR there. Then plugged the original Return line to the 3rd outlet of the FPR, and blocked off the 2nd end of the fuel rail.
Thats how I understand it let me know if I got anything wrong.
Basically my FPR has the 2 outlets for the fuel coming in (IN and OUT), and it rejects the excess fuel by the 3rd outlet (RETURN). So technically once the fuel leaves the FPR for the fuel rail, it is the 100% correct amount so having the second end of the rail block should (in theory) be fine.
I chopped the line between the fuel filter and the fuel rail and installed the FPR there. Then plugged the original Return line to the 3rd outlet of the FPR, and blocked off the 2nd end of the fuel rail.
Thats how I understand it let me know if I got anything wrong.
Hold on, I'm confused. What year fuel rail is this?
Originally Posted by GoalieKeg
Hold on, I'm confused. What year fuel rail is this?
Correct, JClaw?
Thread Starter
Joined: Aug 2004
Posts: 5,433
From: Montreal, Qc, Canada
2003 VQ35 fuel rail. I used to have a fitting for the IN end of the rail, and a stock 1995 FPR on the OUT end of the rail.
Now its still got the same fitting on the IN end of the rail, and the OUT end of the rail is completely blocked off.
Edit: Moderator now eh? Use your powers wisely
Now its still got the same fitting on the IN end of the rail, and the OUT end of the rail is completely blocked off.
Edit: Moderator now eh? Use your powers wisely
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