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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 7.3L Diesel >> Engine Performance Diagnostic Procedures >> Test 4: Intake Restriction >> Purpose
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Test 4: Intake Restriction: Purpose

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.