Ignition System Description

(1/1)

Secondary coil

Spark plug

Core

Igniter

Primary coil

ON

WAVEFORMS IGNITION

TYPICAL WAVEFORMS

TROUBLESHOOTING THE IGNITION SYSTEM

DWELL SECTION

Primary turn-on too late

Primary turn-on

Primary turn-on too early

Poor coil-to-ground conection

Defective coil or pited breaker points

Trigger signal Loose conection

Dirty or burned points

Resistive points

Burnt, dirty, misaligned, defective condenser

Does not indicates a malfunction

Condenser resistance or bad conection between the condenser and the distributor

Indicates open circuit secondary

Indicates very high secondary resistance

Indicates high secondary resistance

Indicates high spark plug circuit resistance

Indicates high secondary resistance

Indicates excessive secondary resistance

Indicates intermittent proplem

Indicates spark plug internal resistance

Indicates internal resistance

Indicates rich fuel mixture

Indicates spark plug blowing out and then restarting

Indicates cap to rotor segment is bad

Indicates reversed coil polarity

Indicates spark plug fouled, shorted or gap too close