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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different car >> Section 165 (Engine Controls - System/Component Tests - EEC-IV (7.3L Diesel)) >> System Diagnosis >> Engine Knocks

Engine Knocks

WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure all engine driven accessories are operating properly and are not causing knock. Verify that engine is not overheating. If engine is overheating, determine cause and repair as necessary. If engine is not overheating, go to next step.
  2. Momentarily loosen injector line nut on one injector one turn or less and tighten connection. Check each cylinder in the same manner. If knock is not isolated to a specific cylinder, go to ENGINE PERFORMANCE DIAGNOSIS  . If knock is isolated to a specific cylinder(s), go to next step.
  3. Check injection nozzle line(s) for kinks or restrictions. Replace any line that is kinked or restricted. Remove suspect nozzle(s) from engine and test. See INJECTION NOZZLE TESTING  under COMPONENT TESTS. Replace any nozzle that does not pass test. If lines and nozzles are okay, go to ENGINE PERFORMANCE DIAGNOSIS  .
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