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Engine RPM dropped
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<blockquote data-quote="kevster30" data-source="post: 91149" data-attributes="member: 10"><p>Noy,</p><p></p><p>The problem that you are facing is caused by one of these two things:</p><p></p><p>1) Faulty Idle Control Valve</p><p>2) Deteriorated vacumm hoses</p><p></p><p>When your air-cond compressor engages, the ECU(DME) will sense the load and send a signal to the ICV to compensate. On older BMWs, this function is mechanical and fucntions on the cahnge in vacumm pressure.</p><p></p><p>All BMW engines need to be air tight and are not tolerant of air leaks. Vacumm hoses harden and crack over time, especially in our wonderfully hot weather.</p><p></p><p>Hope this helps.</p></blockquote><p></p>
[QUOTE="kevster30, post: 91149, member: 10"] Noy, The problem that you are facing is caused by one of these two things: 1) Faulty Idle Control Valve 2) Deteriorated vacumm hoses When your air-cond compressor engages, the ECU(DME) will sense the load and send a signal to the ICV to compensate. On older BMWs, this function is mechanical and fucntions on the cahnge in vacumm pressure. All BMW engines need to be air tight and are not tolerant of air leaks. Vacumm hoses harden and crack over time, especially in our wonderfully hot weather. Hope this helps. [/QUOTE]
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