Car shakes when fan is turned on?

[wokeupquick 10+ year member]

My '99 Mazda 6 violently shakes when I turn the fan on, I can see the RPM jumping. This shaking will stop after a couple of seconds and the car will be calm. Also, after installing my new head unit, I've noticed a more "noticable" vibration/hum in the car that I think is related to the shaking. Any ideas on whats going on here? I'm thinking about replacing the PCV valve, cleaning the air filter, and checking the spark plugs.

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[icpurplepplalot 5,000+ posts]

It's going to explode //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[Brian Owens 10+ year member]

I assume it is an electric fan? Bad fan causing stress on the elctrical system/alternator?

 

[FineLinePimpin 10+ year member]

What fan?..Cooling fan? A/c fan? If its cooling fan then it could be your fan clutch or fan module going bad...if its a/c then it could be your compressor or comp. clutch /field going bad.

 

[Buck 5,000+ posts]

It's going to explode //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

i agree //content.invisioncic.com/y282845/emoticons/blow_up.gif.f2a780e8b12ae09e264cb01720b8dca2.gif

 

[JL Audio 5,000+ posts]

TURN THE FAN OFFFFFFFFFF. car shakes means it's cold.

:-D... wakka wakka.