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Honda
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1998
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Prelude Type-SH L4-2157cc 2.2L DOHC H22A4 (VTEC) 16V
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Repair and Diagnosis
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Powertrain Management
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Description and Operation
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Intake Control System
Intake Control System
Description
When the engine speed is below
3,970 rpm,
the
ECM
supplies ground to the intake control solenoid valve. This opens the solenoid valve sending intake manifold vacuum to the intake control diaphragm.