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lostrider
lostrider, Ford Technician
Category: Ford
Satisfied Customers: 3075
Experience:  ASE Master Technician, Ford Senior Master Technician,Diesel certified, ASE Master, 22 yrs FORD exp.
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Fuel guage stuck on emty low fuel light on , tank full

Customer Question

Fuel guage stuck on emty low fuel light on , tank full. car been sitting 8 yrs.
Submitted: 5 years ago.
Category: Ford
Expert:  lostrider replied 5 years ago.
HiCustomer Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
-What year is your Ford?
-What model is your Ford?
-What type of engine is in your Ford?
-What have you already tried?

Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
Customer: replied 5 years ago.
1988 ford ltd crown victoria, v-8 haven't tried but filling the tank, didn't help
Customer: replied 5 years ago.
do
Customer: replied 5 years ago.
do i get
Expert:  lostrider replied 5 years ago.
Thank you for the reply, the sending unit inside the fuel tank is probly going to be the component that has failed, It is attached to the fuel pump that is mounted in the fuel tank, the tank will need to be pulled and the fuel pump removed to replace the sending unit. here is the testing procedure for the sending unit, hope this helps.
Testing and Inspection

Fuel Tank Analog Gauge

  1. Disconnect wiring harness connector at sending unit and connect ohmmeter between ground terminal and resistor terminal on sending unit.
  2. Meter should read 8---86 ohms. If reading shows no continuity (infinite reading), check ground connection to tank gauge.
  3. If ground is satisfactory, but reading is not within specification, tank unit is defective.
  4. If reading is within specification, remove fuel tank gauge from vehicle and connect ohmmeter between resistor terminal and ground terminal (metal housing on single terminal units).
  5. Observe meter while slowly moving float rod between empty and full stops. Meter should read 60---86 ohms at empty stop and 8---12 ohms at full stop. Change in readings should be smooth, without hesitation or jumping.
  6. If tank unit fails to operate as outlined, unit is defective. Before installing fuel tank gauge, connect wiring harness connector to gauge and move float rod from empty to full position with ignition key in ON position. If dash gauge reading is incorrect, check IVR and dash gauge. If system tests prove satisfactory, but system still does not operate correctly, check that tank gauge rod is not bent or binding and that float is not damaged, loose or filled with fuel.

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