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fuel sending unit question

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Old Mar 2, 2011 | 08:31 PM
  #1  
elalr's Avatar
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From: south mo.
Year: 1990
Model: Cherokee
Engine: 4.0
Default fuel sending unit question

my fuel gauge never drops below 3/8 of a tank....even when my wife and i ran out of fuel lol! now i need to pull the sending unit and check it. on a side note it started leaking fuel at the fuel lines exiting the tank also. how does that plug come out. it looks like a quarter turn but im not sure.
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Old Mar 2, 2011 | 08:35 PM
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99WhiteLightning's Avatar
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From: Western NY
Year: 1999
Model: Cherokee
Engine: 4.0L I6 Power Tech
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we need more info so we can fully help you out, what year do you have and is your sending unit on top or on the side?
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Old Mar 2, 2011 | 08:39 PM
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From: south mo.
Year: 1990
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sorry i forgot all that! 1990 its on the fornt side not on top.
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Old Mar 2, 2011 | 08:41 PM
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From: Havana fl
Year: 1995
Model: Cherokee
Engine: 4.0L
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It's got a lock ring you have to unscrew to remove the hanger and pump assembly
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Old Mar 2, 2011 | 09:05 PM
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From: south mo.
Year: 1990
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thanks i will try to get it out tomorrow
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Old Mar 2, 2011 | 10:02 PM
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From: chico,ca
Year: 1989
Model: Cherokee
Engine: 4.0
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youre gonna need a hammer and screwdriver/chisel/punch to spin the lock ring to take it out and put it back also fyi its a pain in the butt to put it back in under the vehicle but its pretty straight forward have fun
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Old Mar 3, 2011 | 08:05 PM
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From: south mo.
Year: 1990
Model: Cherokee
Engine: 4.0
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got it pulled out and found the leak. i had to re-solder the plate around the tube. it is a pain to get back in. i found a way to mak it easier though. i ground 2 of the notches longer. in fact one longer than the other. i started the first notch rotated it to the next point started it then rotated it and started the last. it worked like a charm. i didnt fix the sending unit yet. i had to buy the pump with it grrrrr!!! oh well it will get here tomorrow
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Old Mar 4, 2011 | 01:10 AM
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Aaron N.S.'s Avatar
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From: Helena, MT
Year: 1989
Model: Cherokee
Engine: 4.0l
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Originally Posted by elalr
got it pulled out and found the leak. i had to re-solder the plate around the tube. it is a pain to get back in. i found a way to mak it easier though. i ground 2 of the notches longer. in fact one longer than the other. i started the first notch rotated it to the next point started it then rotated it and started the last. it worked like a charm. i didnt fix the sending unit yet. i had to buy the pump with it grrrrr!!! oh well it will get here tomorrow
I had a similar problem with mine. I tore apart my sending unit, and cleaned the copper windings with a pencil eraser and re-arched the contact to ensure the two were making a solid connection. also I made sure that there was no fuel in the float that would cause it not to read correctly. so far it's been working flawless. might be worth a try if it works and you can return the new pump.
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Old Mar 4, 2011 | 08:11 AM
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From: south mo.
Year: 1990
Model: Cherokee
Engine: 4.0
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i will give that a shot. thanks
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