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Home >> Ford >> 2003 >> Excursion 5.4 L, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls - System & Component Testing - 7.3L Diesel) >> Engine Performance Diagnostic Procedures >> Test 8B: Fuel Pressure Test >> Recommended Procedure (Excursion & F250-550)
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Recommended Procedure (Excursion & F250-550)

WARNING: This page is about a different variant/trim than selected.

Remove 1/8" pipe plug from top rear of left cylinder head. See Figure. Install fuel pressure gauge. Start engine. Check fuel pressure with a full load on engine. DO NOT brake torque engine for more than 10 seconds. If fuel pressure is 45-80 psi (310-552 kPa), go to next step. If fuel pressure is not 45-80 psi (310-552 kPa), replace fuel filter and retest. If fuel pressure is still low, replace left fuel check valve. Check valve is located in front of left cylinder head between fuel inlet line and cylinder head.

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