Sable V6-183 3.0L DOHC VIN S MFI (1997)
Throttle Body: Description and Operation
PURPOSE
The throttle body controls air flow to the engine.
OPERATION
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A cam/cable is used to rotate the throttle plate from idle to Wide Open Throttle (WOT) position.
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The plate position at idle is set by the lever contacting a throttle return control screw. The head of the screw is removed to make the idle plate set
permanently.
CAUTION: Do not tamper with intake air throttle return control (trim) screws.
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The intake air flow is regulated by an Idle Air Control (IAC) valve.
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The WOT plate position is obtained when the lever contacts the body casting.
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At all throttle positions, the Throttle Position (TP) sensor produces an electrical signal which is used as an input to the Powertrain Control Module
(PCM).
CAUTION: A sealant is applied to the downstream side of the throttle body plate and bore to reduce plate-to-bore leakage. This sealant should NOT
be removed by cleaning.
