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Home >> Ford >> 2003 >> Excursion 6.0 P, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Engine Component Tests - 6.0L (99P F450/550) Diesel >> Engine Performance Diagnostic Procedures >> Test 16: Boost Pressure Test >> Possible Causes

Possible Causes

MAP hose pinched or open.
Leaking intake, hoses or fittings.
Defective turbocharger.
Base engine failure.
Intercooler hoses leaking.
Intercooler.
Sticking EGR.

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