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Old 01-03-2012, 09:23 AM   #1
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rpm fluctuates at idle...MAF?

so my 02 base occasionally fluctuates at idle. tried cleaning the maf multiple times now. but it doesn't seem to do the trick. do i need to just buy a new maf? or could there be a different issue? no CEL, no performance issues that i can tell. but the rpm fluctuates occasional when i'm at idle at the red light. thoughts?

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Old 01-03-2012, 09:29 AM   #2
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Try cleaning your throttle body
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Old 01-03-2012, 09:46 AM   #3
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I agree with Jaay that a throttle body cleaning may help.

How much fluctuation are you experiencing? Does it coincide with disconnecting the battery by any chance?
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Old 01-03-2012, 09:55 AM   #4
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Could also be an issue with the idle controller.
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Old 01-03-2012, 01:29 PM   #5
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Hunting at idle is a sign of an O2 sensor going out
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Old 01-04-2012, 08:37 AM   #6
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Hunting at idle often can be a sign of an air intake leak. I'd start there.

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Old 01-08-2012, 06:31 AM   #7
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mine was doing exactly the same thing. Tried cleaning everything, no different. Changed the MAF sensor and its been perfect since then.

btw I bought it second hand from a reputable porsche breaker here in the uk for 75. If it lasts a year it was better than the hundreds that it costs for a new one or cheap chinese copies off ebay

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