2. Ignition System Types
Points and Condenser
Electronic Ignition
DIS Distributorless Ignition System
Coil on plug (COP)
All Systems have a primary and secondary circuits
• Primary wires go to the coil (Low-Voltage)
• Secondary wires are from the coil (High-Voltage)
26. Ignition Timing
Timing light is hooked
up to #1 spark plug
wire
Timing is checked at
crank shaft balancer
Adjusted by turning
distributor (not
adjustable on DIS or
COP systems)
27. The Reason for Ignition Timing
As “Load” and
RPM change so
must timing
Low LOAD needs
more timing
High LOAD needs
less timing
Low RPM needs
less timing
High RPM needs
more timing