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larry mimbs
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JUL 23, 06:52 PM
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Does the 88 2.5l ecm control the iac by adding and subtracting x pulses for different parameters (trans in gear, a/c on, etc.) or does it attempt to maintain a stable ign pulse setting, or neither of the above?
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theogre
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JUL 23, 11:40 PM
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IAC is a stepper motor. ECM moves it to keep idle RPM.
AC on/off, AT in gear or not, etc, changes engine load even at idle so ECM adjust IAC to keep idle right.
At a given load ECM can shut off 1 or both IAC coils.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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