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1983
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Pickup J20, Standard
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Spark Control System
Spark Control System
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Description
Notes
Spark Coolant Temperature Override (CTO) System
Non-Linear Vacuum Regulator Valve
Operation
Spark Coolant Temperature Override Switch
Single-Function for Standard Cooling
Single-Function for Heavy-Duty Cooling
Non-Linear Vacuum Regulator Valve
Forward Delay Valve
Reverse Delay Valve
Vacuum Advance Control Delay Valve
Maintenance
Testing
Spark Coolant Temperature Override Switch
Single-Function For Standard Cooling (6-Cylinder & V8 Engine)
Single-Function for Standard Cooling (4-Cylinder)
Single-Function for Heavy-Duty Cooling
Non-Linear Vacuum Regulator Valve
Forward Delay Valve
Reverse Delay Valve
Vacuum Spark Control Delay Valve