Mike's Workshop Manuals
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1988
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S15 Jimmy 4.3 Z, 4WD
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Ignition System - HEI/Est/ESC
Ignition System - HEI/Est/ESC
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Description
High Energy Ignition (HEI)
HEI With Electronic Spark Timing (Est)
HEI & Est With Electronic Spark Control (ESC)
Operation
Ignition System
Est System
Notes
All Models W/EST (Except "S" & "T" Series W/2.5L Engine)
"S" & "T" Series With EST & 2.5L Engine
Sensors
Electronic Spark Control (ESC) System
All Fuel Injected Engines (Except 2.5L & 7.4L)
Adjustments
Trouble Shooting
Diagnosis
Component Testing (HEI)
Electronic Module
Ignition Coil
Pick-Up Coil
Capacitor
Component Testing (HEI With Est)
Coil Resistance Check
External Ignition Coil (Sealed Module Connector Distributor)
Integrally Mounted Ignition Coil
Pick-Up Coil Short & Resistance Checks
Overhaul