FixVault
Home › Ford › 1988 › Festiva L Plus › Repair and Diagnosis › Electrical › Gauges › Instrument Panel › Testing › Fuel Computer › Distance To Empty Display Incorrect (Test D)

Distance To Empty Display Incorrect (Test D)

  1. Turn ignition switch to "OFF" position. Disconnect fuel computer from rear of computer. Using an ohmmeter, check resistance between terminals No. 5 and 3 of harness connector. See Fig 1 . Resistance should correspond with that shown in FUEL SENDER RESISTANCE  table. If okay, replace fuel computer. If not, go to next step.
    FUEL SENDER RESISTANCE

    Gauge Reading Sender Resistance (Ohms)
    Empty 50
    1/4 99
    1/2 149
    3/4 198
    Full 247
    Fig 1: Fuel Computer Harness Connector & EEC-IV Connector ID
    G102972Courtesy of FORD MOTOR CO.
  2. Disconnect 5-pin fuel sender pigtail connector located in luggage compartment near right stoplight. Using an ohmmeter, measure resistance between pin No. 2 and vehicle ground. See Fig 1 . Resistance should be the same as that in FUEL SENDER RESISTANCE  table. If okay, repair open or short in wiring between pigtail connector and fuel computer connector. If not, go to next step.
  3. Remove fuel sender from vehicle. Using an ohmmeter, check sender resistance between pins No. 2 and 3 of fuel sender while holding float in different positions. See Fig 1 . Resistance readings should be the same as that in FUEL SENDER RESISTANCE  table. If okay, repair open or short in fuel sender pigtail wiring. If not, replace fuel sender assembly.
About FixVault