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Home >> Ford >> 2003 >> Excursion 7.3 F, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 7.3L Diesel >> Hard Start/No-Start Diagnostic Procedures >> Test 3: Intake/Exhaust Restriction >> Recommended Procedure
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Recommended Procedure

  1. Ensure air cleaner inlet and ducting is not blocked or collapsed. Inspect air cleaner assembly for proper installation. Inspect filter minder on filter housing to ensure intake restriction is below Red marks. Replace filter as necessary.
  2. Ensure exhaust backpressure control valve butterfly bellcrank is not closing while cranking engine. When tang is against the stop, valve is fully open. See Fig 1. Check exhaust system for damaged or blocked pipes.
Fig 1: Identifying Open Exhaust Backpressure Control Valve Position
G95I35277Courtesy of FORD MOTOR CO.
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