Operating instructions

rage _
RECONNECT FOR VACUUM
ADVANCE TEST
FIGURE 39
Bu Electronic
Many of today's modern vehicles use sophisticated computer controlled
spark advance systems. Your Craftsman Analyzer, a top quality timing
light such as the Sears 213400 Timing Light or 219400 Advance Timing
Light, and the vehicle service manual are essentialitools for accurately
checking these complex advance systems.
IMPORTANT: DO NOT ATTEMPT TO SERVICE THESE ELECTRONIC ENGINE SYSTEMS
WITHOUT THE VEHICLE SERIVCE MANUAL.
Some of the Systems currently in use are:
Chrysler Corporation
ELB (Electronic Lean Burn) introduced
in 1976, Re-named ESA (Electronic
Spark Advance) in 1979.
Ford Motor Company:
General Motors:
EEC I, EEC II, EEC 111, (Electronic
Engine Control) introduced in 1977.
ESS (Electronic Spark Selection)
introduced in 1977.
EST (Electronic Spark Timing)
ESC (Electronic Spark Control)
C-4 (Computer Controlled Catalytic
Converter)
C-3 (Computer Conmland Control)