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Ford
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1978
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Thunderbird Base, 5.0L Eng VIN F
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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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THERMACTOR I System
THERMACTOR I System
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Description
Operation
Notes
Air Pump
Air By-Pass Valve
Notes
Air By-Pass Valve (Normally Closed Type)
Air By-Pass Valve (Normally Open Type)
Air By-Pass/Diverter Valve
Vacuum Differential Valve (VDV)
Differential Vacuum Delay Valve (DVDV)
Vacuum Vent Valve
Cold Engine Lock-Out/Overheat Protection (1975-76 Models)
Notes
System 1: Normally Closed
System 2: Normally Closed
Exhaust Check Valve
Troubleshooting
Exhaust Backfire
Testing
Air Pump
Air By-Pass Valve
Normally Closed Type By-Pass Valve
Normally Open Type By-Pass Valve
Air By-Pass/Diverter Valve
Vacuum Differential Valve (VDV)
Differential Vacuum Delay Valve (DVDV)
COLD ENGINE LOCK-OUT/OVERHEAT PROTECTION (1975-76 Models)
Normally Closed System One
Normally Open System Two
Check Valve