95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Vibration goes away with heater or A/C on.Why?

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Old Feb 18, 2016 | 05:27 PM
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Hrddrvs's Avatar
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From: San Fernando Valley,CA
Question Vibration goes away with heater or A/C on.Why?

2000 Tacoma 2.7

Hello,I have a vibration that goes away when I turn the fan on whether it's A/C or heater.Does anyone know a reason why this happens? The truck also runs better with the fan on,I appreciate any help.

Last edited by Hrddrvs; Feb 18, 2016 at 11:55 PM.
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Old Feb 19, 2016 | 04:11 AM
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From: Houston TX
Wild guess - ?

Originally Posted by Hrddrvs
2000 Tacoma 2.7

Hello,I have a vibration that goes away when I turn the fan on whether it's A/C or heater.Does anyone know a reason why this happens? The truck also runs better with the fan on,I appreciate any help.
Since either action creates an additional electric load on the alternator perhaps it slows the engine rpm just enough to smooth things out ?

Free bump with the WAG - what a bargain.

Good luck !
Britt
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