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Does an iac valve close when more air is coming thru the system when the regular throttle body is opened up? Maybe youd want a second tps system where you can reference voltages. i think an iac is backwards of a tps. the user isnt changing the voltage of the iac. when you press on a throttle the tps tells the ecu how much throttle is applied. with an iac the engine sucking tells the computer its story. maybe you can get a tiny throttle body like off an ITB application that can be placed inline.
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