LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 1992 >> Firebird Formula, 5.7 8 >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Basic Testing) >> Basic Ignition System Checks (C4) >> Dis Ignition >> Spark
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Dis Ignition: Spark

WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 1991 Pontiac Sunbird, 1991 Pontiac Grand Prix, 1991 Pontiac Grand Am, 1991 Pontiac Firebird, and 1991 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
  1. If factory tachometer is connected to ignition coil tachometer terminal, disconnect it before performing tests. When removing spark plug wire from spark plug, twist and pull on boot, NOT on wire.
  2. Using Spark Tester (ST-125), check for spark at each spark plug wire using spark tester. Leave opposed firing plug connected while checking for spark. Check spark plug wire resistance on suspect wires. Resistance should be no greater than 30,000 ohms.
scientia non olet · About LEMON Manuals