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Engine Controls - Trouble Shooting - No Codes - Eec-V - Diesel: Diagnosis Ford Excursion I

Testing & Diagnostics ~598 words

SYMPTOM DIAGNOSIS

Symptom checks cannot be used properly unless problem occurs while vehicle is being tested. To reduce diagnostic time, ensure self-diagnostics has indicated no faults are present before diagnosing a symptom. Diagnostics available for symptoms are as follows

  1. «NO CRANK/SLOW CRANK»(ref-140363-S34712889152002052100000)
  2. «STALLS OR QUITS ON ACCELERATION, CRUISE, DECELERATION OR IDLE»(ref-140363-S32321768852002052100000)
  3. «NO-START/NORMAL CRANK, ERRATIC START OR CRANK, HARD START/LONG CRANK OR STALLS AFTER START»(ref-140363-S10853985512002052100000)
  4. «ENGINE WILL ONLY IDLE»(ref-140363-S04597704092002052100000)
  5. «SLOW RETURN TO IDLE OR FAST IDLE»(ref-140363-S00093915242002052100000)
  6. «ROUGH OR ROLLING IDLE OR STALLS WHEN ENGAGING CLUTCH»(ref-140363-S24184153332002052100000)
  7. «RUNS ROUGH, MISSES, BUCKS OR JERKS, HESITATION, STUMBLES, SURGES (ON ACCELERATION OR CRUISE), LACK OR LOSS OF POWER, OR POOR FUEL ECONOMY»(ref-140363-S03225242312002052100000)
  8. «CHECK ENGINE LIGHT CONCERNS»(ref-140363-S39567870772002052100000)
  9. «EXHAUST SMOKE»(ref-140363-S01892410792002052100000)
  10. «CRUISE (SPEED) CONTROL INOPERATIVE»(ref-140363-S22211326792002052100000)
  11. «TRANSMISSION CONTROL INDICATOR LIGHT CONCERNS»(ref-140363-S39761710022002052100000)
  12. «AUTOMATIC TRANSMISSION SHIFT CONCERNS»(ref-140363-S08459308102002052100000)
  13. «HIGH OIL CONSUMPTION/LEAKS»(ref-140363-S03933219102002052100000)
  14. «HARD START/NO-START - DRY RESERVOIR»(ref-140363-S04882983962002052100000)

Symptom Checks

  1. Check Oil Reservoir Check for proper oil API rating (CG4/SH) and viscosity. Remove oil reservoir fill plug and refill reservoir. Reservoir is located on top of engine, near generator. (Схема №1) Start engine and test drive vehicle 10 miles. Remove oil reservoir fill plug and check reservoir oil level. If oil reservoir level is low, go to next step. If oil reservoir is full, go to step 4.
  2. Recheck Oil Reservoir Check and record oil level in reservoir. Allow vehicle to sit overnight and recheck oil level in reservoir. If oil level changed, go to next step. If oil level did not change, see «NO-START/NORMAL CRANK, ERRATIC START OR CRANK, HARD START OR LONG CRANK OR STALLS AFTER START»(ref-140363-S10853985512002052100000) symptom.
  3. Check For Oil Leaks Check engine front cover, valley and oil reservoir for leakage. Remove high pressure oil pump. See «HIGH PRESSURE OIL PUMP»(ref-142317-S25053894712002072900000) under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - TRUCKS - DIESEL article. Check for internal leak past high pressure oil pump gasket surfaces. Remove oil reservoir cover. Check oil reservoir for casting porosity. Repair as necessary and verify repair. If oil leak is not present, reinstall all components and go to next step.
  4. Check Oil Pressure At Reservoir Remove oil reservoir fill plug or oil pressure unit. Install oil pressure gauge and measure oil pressure at idle with engine at normal operating temperature. If oil pressure is more than 12 psi (83 kPa), go to next step. If oil pressure is 12 psi (83 kPa) or less, replace oil pump and verify repair.
  5. Check Engine Oil Pressure Measure engine oil pressure at test port located on left side of block above oil pan rail. If oil pressure reading at test port is 8 psi (55 kPa) more than pressure reading at reservoir, repair cause of pressure drop between main oil gallery and reservoir (rear plug for tappet gallery or tappet out of bore). If oil pressure reading at test port is 8 psi (55 kPa) or less than pressure reading at reservoir, repair cause of low engine oil pressure (pump regulator valve). Verify repair.

INTERMITTENT PROBLEM DIAGNOSIS

Intermittent fault testing requires duplicating circuit or component failure to identify the problem. These procedures may lead to PCM setting a DTC which may help in diagnosis. To reproduce conditions creating an intermittent fault, use the following methods

  1. Lightly vibrate component.
  2. Heat component.
  3. Wiggle or bend wiring harness.
  4. Spray component with water.
  5. Remove/apply vacuum source.

Monitor circuit/component voltage or resistance while simulating intermittent. If engine is running, monitor for self-diagnostic DTCs. See QUICK TEST in SELF-DIAGNOSTICS - EEC-V - DIESEL article. Use test results to identify a faulty component or circuit.

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