LEMON Manuals: Even more car manuals for everyone
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 Misses

Engine Misses

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.
NOTE: Engine will miss when cold if one or more glow plugs are not heating.
  1. If engine misses only when cold, go to GLOW PLUG TESTING  under COMPONENT TESTS. If engine misses at normal operating temperature, go to next step.
  2. Run engine at RPM which causes misfire. Momentarily loosen injector line nut on one injector one turn or less and tighten connection. Check each cylinder in the same manner. If miss is not isolated to a specific cylinder, go to ENGINE PERFORMANCE DIAGNOSIS  . If misfire 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 next step.
  4. Perform cylinder compression test. See MECHANICAL CHECKS in SPECIFICATIONS - 7.3L DIESEL article in the ENGINE PERFORMANCE section. If cylinder compression is within specifications, go to ENGINE PERFORMANCE DIAGNOSIS  . If cylinder compression is not within specifications, perform CRANKCASE PRESSURE TEST  under ENGINE PERFORMANCE DIAGNOSIS. If crankcase pressure is okay, repair or replace valve train as necessary. If crankcase pressure is excessive, overhaul power cylinder as necessary.
scientia non olet · About LEMON Manuals