Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Pontiac >> 1993 >> Firebird Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.7L >> ECM/Pcm Code Charts >> Code 41 - OPTI-Spark Ignition System (Open Or Shorted Est) >> Diagnostic Aids

Diagnostic Aids

Because coil driver gets its power from coil, check ignition feed circuit to ignition coil for opens.

Fig 1: Code 41 Schematic (5.7L "F" Body) Opti-Spark Ignition System (Open or Shorted EST Circuit)
G93B39306
Fig 2: Code 41 Flow Chart (5.7L "F" Body) Opti-Spark Ignition System (Open or Shorted EST Circuit)
G92I04337
scientia non olet · About Mike's Workshop Manuals