3vze FPR return line
02-12-2013, 05:32 AM
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No it runs like ˟˟˟˟, bucking and missing under load , some times I can rev it up a few times and it might run enough to get down the road but I do know I have at least 1 fuel injector leaking has new TPS, MAF, distributor I really don't know what else to do
02-12-2013, 05:34 AM
#4
With the engine cranking or running(as in with the fuel pump running), there should be gas flowing through/out of it in a steady stream. If you pull it off when the engine isn't cranking or running(and the fuel pump isn't running), then you will only get a few drops (or so, very little anyway) of gas out of it.
02-12-2013, 06:18 AM
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I only get a few drops while running, like I said I know I have 1 injector leaking I going to replace all of the o-rings on all of them. I took the line loose past the filter and jumped the fuel pump and also checked by trying to crank the truck and had gas poring out of the the filter so I don't know where else I would be loosing pressure other then the injectors
02-12-2013, 07:22 AM
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The right way to check it is with a fuel pressure gauge. You'll need the banjo-bolt adapter, but this set http://www.actron.com/product_detail.php?pid=16173 comes with it.
As others have pointed out, with the fuel pump running you should get a steady flow out of the FPR on the fuel return line. I can't imagine that even 6 injectors stuck all the way open could reduce that flow to "drops." So I don't think you have enough pressure in the rail, which points to a clogged filter, weak pump, crimped fuel line, etc. Gas "pouring" out of the filter doesn't tell you too much about pressure, unfortunately.
Good luck!
As others have pointed out, with the fuel pump running you should get a steady flow out of the FPR on the fuel return line. I can't imagine that even 6 injectors stuck all the way open could reduce that flow to "drops." So I don't think you have enough pressure in the rail, which points to a clogged filter, weak pump, crimped fuel line, etc. Gas "pouring" out of the filter doesn't tell you too much about pressure, unfortunately.
Good luck!
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02-12-2013, 08:00 AM
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The right way to check it is with a fuel pressure gauge. You'll need the banjo-bolt adapter, but this set http://www.actron.com/product_detail.php?pid=16173 comes with it.
As others have pointed out, with the fuel pump running you should get a steady flow out of the FPR on the fuel return line. I can't imagine that even 6 injectors stuck all the way open could reduce that flow to "drops." So I don't think you have enough pressure in the rail, which points to a clogged filter, weak pump, crimped fuel line, etc. Gas "pouring" out of the filter doesn't tell you too much about pressure, unfortunately.
Good luck!
As others have pointed out, with the fuel pump running you should get a steady flow out of the FPR on the fuel return line. I can't imagine that even 6 injectors stuck all the way open could reduce that flow to "drops." So I don't think you have enough pressure in the rail, which points to a clogged filter, weak pump, crimped fuel line, etc. Gas "pouring" out of the filter doesn't tell you too much about pressure, unfortunately.
Good luck!
Oh, and the FSM is essential too. Great troubleshooting guide in there.
02-12-2013, 05:05 PM
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Yeah I know I need to get a gauge I was just going to replace the o rings cause I know they are leaking and def need a FSM
Last edited by Cpasour; 02-12-2013 at 05:10 PM.
02-13-2013, 08:24 AM
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I know that a clogged filter and a bad pump will give low fuel pressure but will anything else cause low fuel pressure. I changed all of my injector o rings didn't really help any thing still just a few drops out of FPR return line I know I should check fuel pressure but I don't really have time to order one cause this truck is my dd so if there is anything that can cause low pressure please let me know
02-13-2013, 10:06 AM
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The FSM is easy: http://personal.utulsa.edu/~nathan-buchanan/93fsm/
The fuel system isn't rocket science; it goes from A to B. There's a "sock" in the tank on the pump intake, it runs through a hard line to the filter then to the fuel rail then the injectors and out through the FPR.
But right now you're guessing; knowing "every" part that could conceivably fail isn't helpful without a clearer picture of the fuel pressure. There are other ways to check, but none as good as using the tool designed to check fuel pressure.
The fuel system isn't rocket science; it goes from A to B. There's a "sock" in the tank on the pump intake, it runs through a hard line to the filter then to the fuel rail then the injectors and out through the FPR.
But right now you're guessing; knowing "every" part that could conceivably fail isn't helpful without a clearer picture of the fuel pressure. There are other ways to check, but none as good as using the tool designed to check fuel pressure.
Last edited by scope103; 02-13-2013 at 10:07 AM.
02-13-2013, 10:07 PM
#12
You can rent that tester most likely from the local auto store with a refundable deposit.. You can do the cold start injector flow test, with just some basic tools.
Yeah someone already told you to inspect the lines for kinked crushed areas. There is also the strainer in the tank that will clog up if the tank is dirty.
but will anything else cause low fuel pressure
02-14-2013, 05:36 AM
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The PO said the tank was dirty when he changed the pump I checked the lines when fixed the leaking injector o rings but I gonna just put a pump and filter on it I have done every thing else
02-15-2013, 01:27 AM
#15
Get the service manual and start reading up. Lots of links floating around 
basicly it's pull it out, power it up and measure how much comes out.
You haven't done everything else, you haven't even inspected the pump or tested the preasure. Those are bare minimum things, if you just want to throw money at it please please take it to a local mechanic they probably need your cash more than you do.
You'll want to drain rinse and treat that corroded tank, research red-kote or por or "gas tank liner"
basicly it's pull it out, power it up and measure how much comes out.
You haven't done everything else, you haven't even inspected the pump or tested the preasure. Those are bare minimum things, if you just want to throw money at it please please take it to a local mechanic they probably need your cash more than you do.
You'll want to drain rinse and treat that corroded tank, research red-kote or por or "gas tank liner"
02-17-2013, 11:57 PM
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