Question about 1988 Jeep Wrangler

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Any chance of changing the gasoline sending unit without taking the down gasoline t.? Where should I cut a opening into floor?

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Hi there,

The tank is so close to the rear floor you would risk cutting a fuel line, the wiring or the tank. If you have a 4.0, it's fuel injected so the fuel lines could be at up to 40 psi. If ruptured, fuel could be dispersed as an aerosol on to hot metal resulting in a fire ball.

There are way too many things that can go wrong cutting through the floor. Any one of them will cause the need to drop the tank anyway.

My advice? Drop the tank. It's really not that much of a chore. If you have access to a floor jack, it makes getting back in a lot easier.

Best regards

Mike

Posted on Sep 30, 2010

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If not, remove the fuel tank.

Posted on Sep 30, 2010

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NOTE! WHILE THIS IS NOT A HARD REPAIR, YOU ARE DEALING WITH GASOLINE AND GAS VAPOURS. tAKE THE NECESSARY PRECAUTIONS.
Take out the back seat (there are 2 pull-tabs to release it and it will lift up) and you will see 2 square plates that are screwed down. Remove the one on the passenger's side and you will see the the top of the gas tank and the sending unit (the sending unit contains the fuel pump).
Remove the electrical connector on the sending unit, and then start the car. It should die immediatly. Try starting the car several time to relieve the fuel pressure.
Next, remove the negative battery cable for safety. Then remove the 2 hoses going to the sending unit. One is held on by a hose clamp while the other is a threaded fitting. I REMOVED THE RUBBER HOSE FIRST AND ALLOWED THE GAS TO LEAK INTO A CONTAINER UNDER THE FUEL TANK.
AFTER TRYING TO UNSCREW THE METAL HOSE COUPLING, I REALIZED THAT THE RUBBER HOSE CONNECTED TO THE THEREADED FITTING WAS TWISTING INTO A KNOT. ( THE FITTING ON THE SENDING UNIT DOES NOT TURN_YOU CAN RUIN THE SENDING UNIT BY TRYING TO TURN THE FITTING ATTACHED TO THE SENDING UNIT. )
I HAD TO JACK THE VEHICLE UP, PLACE JACK STANDS UNDER THE REAR WHEELS, AND UNSCREW THE OTHER END OF THE THEREADED FITTING FROM THE SENDING UNIT WHERE IT CONNECTS TO THE FUEL LINE UNDERNEATH THE VEHICLE. YOU WILL HAVE TO TURN THE FUEL LINE FITTING TO DISCONNECT IT FROM THE LINE THAT ATTACHES TO THE SENDING UNIT. AT THIS POINT, YOU WILL BE ABLE TO UNSCREW THE THEREADED FITTING THAT GOES TO THE SENDING UNIT. IT IS SAFER TO UNDO BOTH ENDS OF THE THREADED FITTINGS AND REMOVE THE HOSE BEFORE YOU ATTEMPT TO REMOVE THE SENDING UNIT/FUEL PUMP ASSEMBLY.
Then remove the bolts on the sending unit and remove it from the gas tank.
Replace the pump in the sending unit and then put everything back together.

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Lost all power while driving


If this is a gasoline unit, you may have tripped the Inertia sensor and cut off the fuel pump power. The part has a reset button on it and is usually located behind the floor kickpanels.

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Do I have to change the sending unit when I change the fuel pump? How do I know I need the pump and not the sending unit?


Unless defective, you can just replace the fuel pump. I replaced the one in my 1991 Spirit R/T only because the electrical connector went bad (cracked and leaked some drops of gasoline on the floor).
But you can take the opportunity of performing a complete fuel tank cleaning. To do that, you unistall the tank and remove the pump and sending unit. Once removed, you can clean the inside with water and detergent. I used a small Karcher pressure washer and it was a snap. To completely dry the inside of the tank, put a handheld hair drier nozzle into the hole where the gas filling pipe goes into, and let it blow out all the moisture. I did that for 3 to 5 minutes and the sheet metal of the tank got quite warm. That guaranttes a dry tank!. do yourself a favor and replace the gas filter at this time. Good luck!.

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Can I cut an access hole in floor above fuel tank to remove fuel pump on a 2001 Pontiac Grand Am instead of dropping fuel tank and if so, where would I cut out access hole location?


You would have to figure out a way to cut the floor without cutting the tank. The gap is less than one inch. And the fuel lines come out with the sending unit. They have to be disconnected a few inches away from the sending unit.

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1 Answer

Leaking gasoline from tank or sendig unit how difficult to fix?


That all depends on the leak. Either way you have to remove the tank. Using a large piece of wood that is about the size of the bottom of the tank, and a floor jack, slowly remove the bolts at one end of the straps which hold the tank in place. Make sure the tank is firmly supported. Take thke bolts out of the filler neck by opening the filler door, there should be three bolts, and if possible remove the fuel lines and the electrical plug before youstart bringing it down, Lower the gas tank slowly. If it is the sending unit, there is an o-ring that seals it in the gas tank, if it is a hole in the tank, you can try a repair kit, but in my experience, it doesn't work all that well.

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1 Answer

Is there an access hatch in the floor of a 1996 gmc safari for the fuel pump


no, sorry. Here are the R&R instructions from autozone.com:

The following procedure requires the use of the GM Fuel Gauge Sending Unit Retaining Cam tool No. J-24187 or equivalent.


CAUTION Before removing any component of the fuel system, be sure to reduce the fuel pressure in the system. The pressure regulator contains an orifice in the fuel system; when the engine is turned Off, the pressure in the system will bleed down within a few minutes.

  1. If the fuel system has been in use, turn the ignition switch to OFF and allow the system time to reduce the fuel pressure.
  2. Disconnect the negative battery terminal from the battery.

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. Using a hand pump or a siphon hose, drain the gasoline into an approved container.
  2. Raise and support the vehicle on jackstands.
  3. Support the fuel tank and remove the fuel tank-to-vehicle straps.
  4. Lower the tank slightly, then remove the sender unit wires, the hoses and the ground strap.
  5. Remove the fuel tank from the vehicle.
  6. Using the GM Fuel Gauge Sending Unit Retaining Cam tool No. J-24187 (or equivalent) or a brass drift and a hammer, remove the cam locking ring (fuel sending unit) counterclockwise, then lift the sending unit from the fuel tank.
  7. Remove the fuel pump from the fuel sending unit, by performing the following procedures:
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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 it, if necessary.
  2. Push the fuel pump onto the sending tube.
  3. Using a new sending unit-to-fuel tank O-ring, install the sending unit into the fuel tank.

When installing the sending unit, be careful not to fold or twist the fuel strainer, for it will restrict the fuel flow.
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  2. Install the fuel tank, align the insulator strips and install the strap bolts. Torque the inner fuel tank strap-to-vehicle bolts to 26 ft. lbs. (35 Nm) and the outer fuel tank strap-to-vehicle nuts/bolts to 26 ft. lbs. (35 Nm).
  3. Connect the fuel lines.
  4. Connect the negative battery cable, start the engine and check for leaks.
  5. Lower the vehicle.

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Fuel level sending unit which is part of the fuel pump. This can be replaced without buying the whole fuel pump unit. Dealer item. If you are going to attemp doing this youself buy a Chiltons 2003 -2006 $20 cost. You have to drop the gas tank to get to this Fuel Pump/Fuel Presure Regulator/Fuel Level Sending Unit Assembly. If just need to know go to Auto Zone they have books open to look.

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i cant be avoided sometimes you just have to bit the bullet and remove the tank.

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