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Home >> Pontiac >> 1997 >> Firebird Formula, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Basic Engine Testing - 5.7L >> Basic Ignition System Checks >> OPTI-Spark >> Ignition Coil Power Source

Ignition Coil Power Source

Turn ignition on. Check for battery voltage on ignition feed circuit to ignition coil. If battery voltage is not present, check for blown 10-amp COIL fuse. If fuse is okay, check for open between fuse and ignition coil.