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Repaired two fuel lines ,removed sending unit from tank, can't remember which lines go where three lines from engine .

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  • Cars & Trucks Master
  • 5,280 Answers

Can you identify or remember which pipe on the sending unit, the pump module, is the main outlet from the pump?
The three lines are the main feed or pressure line to the engine, the return line from the engine to the tank-this line is often smaller than the main line. And the third line is not a fuel line, but the vent line for fumes from the enclosed tank to the charcoal canister. This line may be identifiable by pipe diameter being smaller, or sometimes using rubber hoses with it, or maybe just a little offstanding from the other two lines. The main line (pressure line) will be the line that has the fuel filter in it. You can identify the main line this way, then just figure out where it connects onto the tank, and sort out the other two lines-the return line and the (?smaller?) vent line.

Posted on May 08, 2017

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Posted on Jan 02, 2017

SOURCE: fuel gage sending unit

I have a 1991 Ford F-250 with dual gas tanks. When I turn the ignition on there is no power to the fuel sending uhit. You cannot hear the unit when the key is turned on, therefore the vehicle will not start. While attempting to check for power I grabbed the frame and the I could hear the unit click on. I drove the vehicle and upon parking the vehicle I shut the ignition off and the problem occurred again. Seems to me there is a short somewhere, but what is the best solution.

Posted on Sep 22, 2008

  • 132 Answers

SOURCE: replacing my 01 silverado fuel pump

parts store carry a special tool for these lines.

Posted on Jan 30, 2009

  • 6982 Answers

SOURCE: gas is not getting from gas tank to Carburator ..

Make sure you have the lines attached correctly on the sending unit and make sure there no small holes in the line. The pump pulls fuel and will draw in air. To make sure the pump is good, attach the tank side to a container of fuel and see if the engine starts. (keep the container below the pump or it can start a siphon and appear to be OK when it's not)
If the repair to the sender involved soldering up a line leak, make sure the line is not still leaking and that the line has not filled with solder.
It's a really simple system...there are no "trick" items there. If everything is intact and the pump is good, it has to work!!!

Posted on Jun 10, 2010

  • 1 Answer

SOURCE: after replacing in tank fuel pump & sendind unit, in line fuel filter, truck still not getting gas

Your ecu is most likely the problem if it is bad it wont send power to the fuel pump. You can check it by turning on the ignition then listen for noise coming from fuel tank. You should be able to hear the fuel pump come on.

Posted on Aug 14, 2012

emissionwiz
  • 75797 Answers

SOURCE: I need to know where the fuel lines go from the back of the chassis into the fuel tank on a 1993 Mitsubishi 3000gt?

One is vapor, the other is pressure and the last is return line

Posted on Sep 18, 2012

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Our 2004 yukon has become Hard Starting. I took it to the dealer and they said it was the Fuel pump. Sometimes it starts on the first turn of the key and the next time we will have to try starting twice. I...


First you have to make sure there is little to no fuel in tank. Drive vehicle untill it is almost empty. Then disconnect fuel pump relay and fuse. Try to start vehicle to relieve fuel pressure. If you do not have a hoist elevate the vehicle on 4 jack stands. Disconnect the fuel line and return line nearest tank. Disconnect filler hose fron tank. Place 18" x18" piece of plywood on hydraulic jack and place under and against middle of tank. Disconnect straps holding tank in place. Lower tank slowly untill you can disconnect electrical connectors. Remove tank and change pump. There is a ring holding sending unit and pump on tank. this ring can be moved with a mallet. Make sure to clean off all debris from top of tank before removing sending unit. Remove sending unit carefuly and remember where float is orriented in tank.

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Gas is not getting from gas tank to Carburator .. 1987/88 Wrangler 42. engine was recently rebuilt .. gas tank sending unit was removed and repaired .. fuel line was blown out with air compressor. fuel...


Make sure you have the lines attached correctly on the sending unit and make sure there no small holes in the line. The pump pulls fuel and will draw in air. To make sure the pump is good, attach the tank side to a container of fuel and see if the engine starts. (keep the container below the pump or it can start a siphon and appear to be OK when it's not)
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It's a really simple system...there are no "trick" items there. If everything is intact and the pump is good, it has to work!!!

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How to remove fuel pump on 1988 gmc s 15 pickup


GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual Electric Fuel Pump - REMOVAL & INSTALLATION
  1. Properly relieve the fuel system pressure.
  2. Connect the negative battery cable.
Be sure to keep a Class B (dry chemical) fire extinguisher nearby.

CAUTION Due to the possibility of fire or explosion, never drain or store gasoline in an open container.
  1. Drain the fuel tank, then remove it from the vehicle. refer to the procedure found later in this section for details.
  2. Using the GM fuel gauge sending unit retaining cam tool No. J-24187, J-36608 (or equivalent) or a brass drift and a hammer, remove the cam locking ring (fuel sending unit) by twisting counterclockwise. With the locking ring released, carefully lift the sending unit from the fuel tank.
  3. Remove the fuel pump from the fuel sending unit, by performing the following procedures:
    1. Pull the fuel pump up into the mounting tube, while pulling outward (away) from the bottom support.
When removing the fuel pump from the sending unit, be careful not to damage the rubber insulator and the strainer.
  1. When the pump assembly is clear of the bottom support, pull it out of the rubber connector.
To install:
  1. Inspect the fuel pump hose and bottom sound insulator for signs of deterioration, then replace, as necessary.
  2. Push the fuel pump onto the sending tube.
  3. Using a new sending unit-to-fuel tank O-ring, carefully lower the sending unit/fuel pump assembly into the fuel tank.
When installing the sending unit, be careful not to fold or twist the fuel strainer or it may restrict the fuel flow.
  1. Secure the sending unit by turning or driving the lockring clockwise and into position under the tabs.
  2. Install the fuel tank assembly to the vehicle.
  3. Connect the negative battery cable and check for proper pump operation.

Good luck (remember rated this).

May 24, 2010 | 1988 GMC S-15

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How to replace fuel sending unit on 2003 Chevy Impalla


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Apr 04, 2010 | 2003 Chevrolet Impala

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Changing a fuel pump in a 1999 VP.


Things You'll Need:
  • Ratchet and socket
  • Wrench set
  • Floor jack and 2 jack stands
  • Ratchet extension
  • Fuel tank sending unit wrench number 310-123
  • Screwdriver
  • Slip joint pliers
  • New O-ring seal
  • Clean engine oil
Relieve the Fuel System Pressure
  1. Step 1 Detach the splash shield from the frame rail located underneath the driver's side door. Use a ratchet and socket.
  2. Step 2 Unplug the electrical connector you will see after removing the splash shield. The connector leads to the fuel pump module.
  3. Step 3 Start the engine and let it idle until it stalls. Then crank the engine for about 5 seconds to relieve the remaining fuel pressure from the system. If the engine does not start due to a bad fuel pump, crank the engine to make sure fuel pressure is relieved.
  4. Step 4 Turn the ignition key to the Off position.
  5. Remove the Fuel Pump
  6. Step 1 Disconnect the ground, battery cable from the battery using a wrench.
  7. Step 2 Jack up the rear of your F-150 using a floor jack and support it on 2 jack stands.
  8. Step 3 Remove the tank shield if your particular model is equipped with it using a ratchet, ratchet extension and socket.
  9. Step 4 Support the fuel tank with the floor jack.
  10. Step 5 Disconnect the straps holding the tank to the truck's body using the ratchet, ratchet extension and socket.
  11. Step 6 Lower the fuel tank just enough to gain access to the fuel lines, vapor lines and fuel pump electrical connector on top of the tank.
  12. Step 7 Disconnect the fuel lines and vapor lines from the sending unit/pump module. Press the lock tabs on the lines quick connectors and carefully pull the lines from their fittings. Then unplug the pump-module electrical connector.
  13. Step 8 Release the sending unit/pump module by turning the lock ring counterclockwise using the fuel tank sending unit wrench 310-123 or equivalent. See the Resources box and Tip boxes at the bottom of this article for more information.
  14. Step 9 Lift the sending unit/pump module off the tank carefully and discard the O-ring seal underneath the flange of the module.
  15. Install the Fuel Pump
  16. Step 1 Remove the old fuel pump from the module using a screwdriver and a pair of slip joint pliers and install the new pump on the module.
  17. Step 2 Lubricate the new O-ring seal with clean engine oil and lay the seal on the fuel tank opening.
  18. Step 3 Install the sending unit/pump module in the tank and turn the lock ring clockwise using the fuel tank sending unit wrench.
  19. Step 4 Lift the fuel tank just enough to attach the fuel lines, vapor line and plug the pump module electrical connector.
  20. Step 5 Raise the fuel tank to set it in its mounting place and secure the tank straps using the ratchet, ratchet extension and socket.
  21. Step 6 Install the fuel tank shield using the ratchet, ratchet extension and socket, if you had to remove it.
  22. Step 7 Lower your Cadillac Deville.
  23. Step 8 Connect the ground, battery cable using the wrench.
  24. Build Fuel System Pressure
  25. Step 1 Plug the electrical connector located on the frame rail underneath the driver's side door.
  26. Step 2 Attach the splash shield to the frame rail using the ratchet and socket.
  27. Step 3 Turn the ignition key to the "On" position for three seconds to let the fuel system build pressure. Then turn the key to the "Off" position. Repeat the cycle three times to make sure the system has enough pressure.
  28. Step 4 Start the engine and check for fuel leaks.
Good luck and do rate this solution, please.

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2 Answers

Where is the fuel pump and fuel filter at


The fuel pump and strainer are located inside the fuel tank.

There are three possible locations for this component due to different production dates/locations: under hood, passenger side, rear engine area, below firewall, mounted in fuel line or under vehicle, passenger side, below seating area, mounted on frame in fuel line or under vehicle, driver side, below rear seating area, mounted on frame in fuel line

Easiest method to find, follow the fuel pump lines from the tank forward, you'll find the filter.

If you change the filter, it's not a bad idea to put a little Gumout fuel injector cleaner directly into that new filter, about 1/2 full before reinstalling, that will give your injectors a quick clean. It can cause a short sputter or two but I've never seen it cause a problem and it does help clean the fuel system quickly.

You'll also want to remember to turn the key on for 3 seconds, off for 3 seconds, alternating until the fuel pressure builds before trying to start the vehicle, after repairs are made to either the pump or the filter.

Use caution when removing lines, pressure and flammable !

Good Luck
.

Mar 10, 2010 | 1992 Buick LeSabre

2 Answers

How do I replace the fuel pump on a F150 Ford truck and do i need any speical tools to do this


Things You'll Need:
  • Ratchet and socket
  • Wrench set
  • Floor jack and 2 jack stands
  • Ratchet extension
  • Fuel tank sending unit wrench number 310-123
  • Screwdriver
  • Slip joint pliers
  • New O-ring seal
  • Clean engine oil.
Steps to replace fuel pump:
  • Detach the splash shield from the frame rail located underneath the driver's side door. Use a ratchet and socket.
  • Unplug the electrical connector you will see after removing the splash shield. The connector leads to the fuel pump module.
  • Start the engine and let it idle until it stalls. Then crank the engine for about 5 seconds to relieve the remaining fuel pressure from the system. If the engine does not start due to a bad fuel pump, crank the engine to make sure fuel pressure is relieved.
  • Turn the ignition key to the Off position.
  • Disconnect the ground, battery cable from the battery using a wrench.
  • Jack up the rear of your F-150 using a floor jack and support it on 2 jack stands.
  • Remove the tank shield if your particular model is equipped with it using a ratchet, ratchet extension and socket.
  • Support the fuel tank with the floor jack.
  • Disconnect the straps holding the tank to the truck's body using the ratchet, ratchet extension and socket.
  • Lower the fuel tank just enough to gain access to the fuel lines, vapor lines and fuel pump electrical connector on top of the tank.
  • Disconnect the fuel lines and vapor lines from the sending unit/pump module. Press the lock tabs on the lines quick connectors and carefully pull the lines from their fittings. Then unplug the pump-module electrical connector.
  • Release the sending unit/pump module by turning the lock ring counterclockwise using the fuel tank sending unit wrench 310-123 or equivalent. See the Resources box and Tip boxes at the bottom of this article for more information.
  • Lift the sending unit/pump module off the tank carefully and discard the O-ring seal underneath the flange of the module.

    Install the Fuel Pump
  • Remove the old fuel pump from the module using a screwdriver and a pair of slip joint pliers and install the new pump on the module.
  • Lubricate the new O-ring seal with clean engine oil and lay the seal on the fuel tank opening.
  • Install the sending unit/pump module in the tank and turn the lock ring clockwise using the fuel tank sending unit wrench.
  • Lift the fuel tank just enough to attach the fuel lines, vapor line and plug the pump module electrical connector.
  • Raise the fuel tank to set it in its mounting place and secure the tank straps using the ratchet, ratchet extension and socket.
  • Install the fuel tank shield using the ratchet, ratchet extension and socket, if you had to remove it.
  • Lower your F-150..
  • Connect the ground, battery cable using the wrench.

Dec 05, 2009 | 2004 Ford F150

2 Answers

How to change fuel pump 1990 cadillac seville


The fuel pump and sending unit is located in the tank. I hope your tank is empty, if not you will need to siphon it out. It is dangerous with the gasoline, and remember the fumes burn, not gas. You start by removing the filler hose, then loosen straps, detach sending unit wire and fuel line, then lower tank. Then unscrew the sending unit/pump and replace. reinstall.

Jul 05, 2009 | 1990 Cadillac SeVille

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