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Buick
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1975
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Apollo Base, 4.1L Eng VIN D, Automatic Trans
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Repair and Diagnosis
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Engine Mechanical
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Auxiliary Emission Control Systems
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Controlled Combustion System
Controlled Combustion System
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Description & Operation
Notes
Transmission Controlled Spark (TCS)
Ported Vacuum Advance with EGR (PVA/EGR)
Temperature Switch
Vacuum Delay Valve (VDV)
EFE Thermal Vacuum Switch (EFE/TVS)
Distributor Vacuum Valve (DVV)
Distributor Thermal Vacuum Switch (DTVS)
Distributor Vacuum Advance Solenoid
Idle Stop Solenoid
Testing
TCS System
EFE/TVS System
DTVS (Engine with Full Manifold Vacuum Spark)
Choke Thermal Vacuum Switch (CTVS)
Adjustments
CTVS
Transmission Switch
Maintenance