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?

Try cleaning your throttle body

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?

Could also be an issue with the idle controller.

Hunting at idle is a sign of an O2 sensor going out

Hunting at idle often can be a sign of an air intake leak. I'd start there.

Regards, PK

maf
 

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