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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 4: Intake Restriction >> Purpose

Test 4: Intake Restriction: Purpose

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This is a visual inspection to determine if an air intake restriction is contributing to a low power condition. If engine does have a high air intake restriction, a large amount of Black or Blue smoke will be produced.

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