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What can I do with Fuel line mixup at the pump. I not sure which one goes where? I have the filter line connected, but the other two I have no ideae. Can any one help me please.

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The pressure line goes to the fuel rail and the other is a fuel return line which goes into the tank.

Posted on Dec 11, 2014


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Posted on Jan 02, 2017

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SOURCE: engine starts briefly then dies

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Posted on Jan 12, 2009

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SOURCE: 1992 Lexus LS 400

I was told there is no fuel filter

Posted on Mar 11, 2009

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SOURCE: Fuel line connections coming from fuel pump on 1999 Chevy S10 4cy

Id say the fastest way to find out which line is the pressure side is to put both lines into a bucket and turn the key on for a second. the pressure line will have fuel coming out of it...other is the return line.

Posted on Mar 19, 2009

  • 819 Answers

SOURCE: Little Black Box, Fuel Pump, Fuel Lines

it sounds like you have a line hooked up to the wrong spot, and that little black box sounds like the charcoal canister, which is used to filter out fuel vapors. it sounds like either the supply or return line has been hooked into the vapor line. retrace your steps, largest diameter line is supply, medium is return, smallest line is vapor line. good luck!

Posted on Jun 03, 2010

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SOURCE: my chevy c1500 1993 model

The first thing is to make sure you are getting fuel to throttlebody see if it sprays,this year is fuel injected not carburated, if so good. next is to test for spark. remove a plugwire and stick a screwdriver into the boot and place screwdriver near metal ground have someone crank motor and see if theres spark, it sounds like you check everything except spark the most common problem with these would be the ignition contorl module,this is located under the dist cap, remove two connector and two screws and it removes have it tested at parts store, this when bad may also stop the injector from spraying fuel, this sounds like its your problem, they are easy to replace. hope the helps and also herea picture of the control module.86262cc.jpg

Posted on Sep 23, 2010

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I put new fuel pump but still won't pump gas.

Two things to check
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if so, reconnect and dis connect fuel line after filter, see if you have pressure.

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Good luck and Merry Christmas, Bill

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I have mixup on the fuel lines to pump other than the filter line. The one line by the filter has a small female connection. Does anyone know if it goes to the middle metal line or the one to the righ

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1 Answer

Fuel filter

The new filter is cheap and a vary good idea to replace 5 or 6 years it will save the intank pump from working way to hard to pump fuel to the intake manifold injection system . Alot of fuel pumps go bad because the inline filter is restrected . The filter is located under the drivers door on the inside of the frame rail close to the floor board look for the fuel line that comes from the tank pump and the line that goes up to the engine compartment area so it will have a metal line on bolth sides of it that has a connecter . What you need is open end wrenches or flare nut wrenches just make sure they are the correct sizes . You need to lossen these connections . The filter has a welded nut on it the line has a compresstion fitting that is part of the line and smaller then the welded nut on the filter but will not slide off the line because the line is flared so it will seal againest the filter . I would recomend getting the new filter first note the arrow on it this is the derrection the fuel must flow from the tank to the engine the arrow points to the engine and you can also know what size the welded nuts on the filter are also you can see what you are looking for under the vehicle . The fuel line nut is likely 5/8 s but may be metric 14 or 15 mm . The problem is you will not have a lot of room to work the filter is mounted to the frame with a strap type fastener and can be removed but if you can lossen the fittings with out removeing this first it will be easyer . Wonce the fittings are lose you will need to lossen or remove this strap to slide the new filter in place . And be ready for gas to leak out you will get 6 or so ounces of fuel that will spill on you and the ground . I hope i didn't make sound hard to do .The hardest part is breaking the lines free so make sure you have the right size wrenches and the limited room to get at the fittings GOOD LUCK

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