AFM......quite common in the my99-my00.

Most likekly due to the sensor being overly sensative to dirt and vibrations.

Or maybe just a dodgy choice on subies behalf........

Put it this way you would rather by 10 AFMS than a new gearbox (not that they have anything to do with one another....but probably cheapest part around for that model)

Hope this helps...furthermore Just to let you know i bought my car with a faulty AFM i thought the jerking was turbo lag...hehehehe (*puts on flame suit*)...WHAT A LOSER...I KNOW

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MY04 WRX CLUBSPEC 7