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Different Idle sound

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Old 04-21-2007, 01:41 AM
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Mustangn
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Default Different Idle sound
When my engine is Idling and I press the power window button up or down the Idle sound becomes different. Is this something I should be worried about.
I have a 91 mustang GT. Stock
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Old 04-21-2007, 01:51 AM
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PRO50SC
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Default RE: Different Idle sound
Is it a measurable difference, 2-300 rpms?

The window motor pulls a lot of current from the charging system but it should not be enough to drag the idle down. Either the window motor is drawing too many amps(does it move slow) or possibly the alt is not putting out enough.
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Old 04-21-2007, 02:00 AM
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Mustangn
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Default RE: Different Idle sound
No its not 200-300 rpm.Its not noticable on the rpm gauge but the engine sound becomes deeper.
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Old 04-21-2007, 02:03 AM
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PRO50SC
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Default RE: Different Idle sound
Still running the stock alterator? Is this a new issue?
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Old 04-21-2007, 02:14 AM
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Mustangn
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Default RE: Different Idle sound
It is the stock altenator. I just never noticed this before, but than again I neverlistendto the engine while moving the window up or down.
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Old 04-21-2007, 02:19 AM
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PRO50SC
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Default RE: Different Idle sound
LOL I wouldn't worry about it.
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