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Chevrolet
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1987
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Chevette L4-98 1.6L
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Distributor
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Distributor Vacuum Control
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Description and Operation
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Distributor Thermal Control Valve (DTCV)
Distributor Thermal Control Valve (DTCV)
This valve is used in the manifold vacuum line to the
distributor
vacuum advance to improve driveability during cold engine operation.