Never-ending Fuel system problems
Never-ending Fuel system problems Ok so i finally got time to work on the truck again today. A little background for those that dont remember.
-1999 f-body fuel pump assy with the fuel pressure regulator removed
-97-98 vette style return fuel rail setup with in rail fuel regulator
-I have two 3/8" lines running the length of the frame connecting to the fuel rails---pretty straightforward.
For some reason when I have the lines hooked up the way pictured, which I believe is the proper way the injectors dont get any fuel. If I push the shrader valve in there is no fuel at all coming out. When I switch the fuel lines around it starts and runs fine.
Last time I posted with this problem I was told to remove the regulator on the fuel pump assembly, so I tried it and it didnt seem to affect anything.
Is it possible the rail mounted fpr is defective? I was told this was all new from S&P when I bought the package.
If no one else has any ideas will it hurt to run the fuel lines "backwards"?
thanks guys...this is just one of those things that just I cant seem to fix myself so I appreciate the help!
-1999 f-body fuel pump assy with the fuel pressure regulator removed
-97-98 vette style return fuel rail setup with in rail fuel regulator
-I have two 3/8" lines running the length of the frame connecting to the fuel rails---pretty straightforward.
For some reason when I have the lines hooked up the way pictured, which I believe is the proper way the injectors dont get any fuel. If I push the shrader valve in there is no fuel at all coming out. When I switch the fuel lines around it starts and runs fine.
Last time I posted with this problem I was told to remove the regulator on the fuel pump assembly, so I tried it and it didnt seem to affect anything.
Is it possible the rail mounted fpr is defective? I was told this was all new from S&P when I bought the package.
If no one else has any ideas will it hurt to run the fuel lines "backwards"?
thanks guys...this is just one of those things that just I cant seem to fix myself so I appreciate the help!
ok on the 4 wire plug on the fuel pump I have the black wire (C) going ground and the gray one (B) running to the power source. I cant seem to find the wiring diagram for this (search isnt working right now). Should I just swap them around and see what happens?
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Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
Leave the wiring alone and fix the plumbing first.
If you have the picture labeled correctly you have those lines swapped. The line out of the FPR is the return line NOT the feed line.
And yes the FPR needs to be removed from the tank unit when using a fuel rail FPR. I hope you didn't put it back in.
Quote: "When I switch the fuel lines around it starts and runs fine."
That ought to tell you something.
If you have the picture labeled correctly you have those lines swapped. The line out of the FPR is the return line NOT the feed line.
And yes the FPR needs to be removed from the tank unit when using a fuel rail FPR. I hope you didn't put it back in.
Quote: "When I switch the fuel lines around it starts and runs fine."
That ought to tell you something.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
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Originally Posted by Speartech
Leave the wiring alone and fix the plumbing first.
If you have the picture labeled correctly you have those lines swapped. The line out of the FPR is the return line NOT the feed line.
And yes the FPR needs to be removed from the tank unit when using a fuel rail FPR. I hope you didn't put it back in.
Quote: "When I switch the fuel lines around it starts and runs fine."
That ought to tell you something.
If you have the picture labeled correctly you have those lines swapped. The line out of the FPR is the return line NOT the feed line.
And yes the FPR needs to be removed from the tank unit when using a fuel rail FPR. I hope you didn't put it back in.
Quote: "When I switch the fuel lines around it starts and runs fine."
That ought to tell you something.
Just a matter of sealing up those darn Russell Aluminum compression fittings now.
thanks for the help everyone
