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Fuel gauge not working properly

Tiny
BRADLEY54
  • MEMBER
  • 1984 JEEP CJ7
  • 4.2L
  • 6 CYL
  • 4WD
  • MANUAL
  • 76,000 MILES
Okay, so my fuel gauge has never worked properly. When I first got the vehicle the temperature, fuel and pressure gauge did not work. I have replaced the instrument cluster (fuel, temperature speedometer, pressure and volt) still did not fix the problem. So I took it one step further and dropped the fuel tank (it was in bad shape so I replace both the fuel tank and sending unit/float.) New grounding wire from fuel tank to frame/ new grounding wire from dash to body/frame. FYI since replacing the fuel sending unit/gas tank my fuel gauge is working a little, full tank reads in-between 1/2 and 3/4 and empty (runs completely out of gas at red light with a line of cars behind me, lol) at 1/4 tank.

Any advise would be appreciated.
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Tuesday, April 17th, 2018 AT 5:16 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening.

Did you check the voltage to the sender from the dash cluster?
If not, that is where I would start.

It sounds like a wiring issue along the frame.

Roy
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Tuesday, April 17th, 2018 AT 5:39 PM
Tiny
BRADLEY54
  • MEMBER
  • 2 POSTS
I do not have a voltage meter. I will pick one up tomorrow and report back here with my findings.
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Tuesday, April 17th, 2018 AT 5:41 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like a plan.

Roy
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Tuesday, April 17th, 2018 AT 5:55 PM

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