Okay, now it's time for a dumb question: why do we need input signals from the power steering pump and air conditioner? We already have input from the Hall sensor telling us what the engine speed is, and if it's too low we increase the idle air flow & if it's too high we decrease the idle air flow...who really cares whether the change in idle speed is from AC, or PS, or from a belt driven coffee grinder accessory that someone has installed. If the throttle valve is closed, then adjust the idle air flow to keep the rpms within a narrow range. When there is partial throttle, keep the idle air flow at a moderate level to avoid shutting down the engine if the throttle is released suddenly. What's wrong with my thinking? Brett |
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