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Home >> Ford >> 1990 >> Cutaway 7.3 M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes - Diesel >> Engine Quits, Stalls Or Stumbles

Engine Quits, Stalls Or Stumbles

  1. Check and/or adjust dynamic injection pump timing. See DYNAMIC TIMING in the appropriate ADJUSTMENTS article in this section. See the following menu. If injection pump timing and idle speed is correct, go to next step.
    • For 1990 models, see: ADJUSTMENTS
    • For 1991 models, see: ADJUSTMENTS
  2. Crank engine and check voltage at Fuel Shutoff (FS) solenoid. FS solenoid terminal is located at front of injection pump. Voltage must be at least 9 volts. Check FS solenoid terminal for dirt, corrosion, loose or broken electrical connection and repair or replace as necessary. If solenoid terminal and electrical connection are okay and at least 9 volts are present while cranking, go to next step. If at least 9 volts are not present, check Red/Light Green wire from FS solenoid to ignition switch. Repair wire as necessary, repeat this test. See Figure.
  3. If engine is hot, go to next step. If engine is cold, crank engine and check voltage at Cold Advance (CA) solenoid. CA solenoid is located at left rear of injection pump. Voltage must be no less than 9 volts. If at least 9 volts are not present, verify switching function of Engine Temperature Switch (ETS), located behind thermostat housing. If at least 9 volts are not present at ETS, check Red/Light Green wire from ETS to ignition switch. Repair wire as necessary, repeat this test. See Figure.
  4. If engine is hot, check for voltage at Cold Advance (CA) solenoid. CA solenoid is located at left rear of injection pump. Voltage should not be present. If voltage is not present at CA solenoid, go to ENGINE PERFORMANCE DIAGNOSTICS . If voltage is present, replace engine temperature switch and repeat this step.
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