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Mustang Forums
2011-2014 Mustangs
2011-2014 Mustang Talk
Cooling fan issue
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<blockquote data-quote="GN_Mike" data-source="post: 16203503" data-attributes="member: 182128"><p>How much does the engine bog down? Like a hundred RPM? I’ve seen this happen on the cars I’ve owned that had large cooling fans. When the fan kicks on, there is a huge inrush of current required to start the motor. When that happens, the alternator goes to full output and drags the engine down a bit. The ECU should then compensate by opening the IAC to recover the idle speed. This should all happen in a second or two. </p><p></p><p>Is this what you are seeing, or is your engine nearly stalling?</p><p></p><p></p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="GN_Mike, post: 16203503, member: 182128"] How much does the engine bog down? Like a hundred RPM? I’ve seen this happen on the cars I’ve owned that had large cooling fans. When the fan kicks on, there is a huge inrush of current required to start the motor. When that happens, the alternator goes to full output and drags the engine down a bit. The ECU should then compensate by opening the IAC to recover the idle speed. This should all happen in a second or two. Is this what you are seeing, or is your engine nearly stalling? Sent from my iPhone using Tapatalk [/QUOTE]
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2011-2014 Mustang Talk
Cooling fan issue
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