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Home >> Ford >> 2002 >> Excursion 7.3 F, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (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 does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

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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