06 WRX bucking under light throttle

[Cpt_Underpants]

My car started bucking a little bit on my way to work this morning.

I was at part throttle, light acceleration in 3rd gear between 2-4000 rpm when I felt it first. It's also present in 2nd gear.

Any ideas as to what it could be?

The car is stock, with the exception of an SPT Intake. Has 104k miles but the local Subaru Dealer said it's in great shape.

I just bought it two weeks ago and don't want to deal with issues already.

[Donkey]

My guess is either it just recently rained hard or you went through a car wash,yes?

[Cpt_Underpants]

....it rained pretty damned hard the past two days...

[Donkey]

Your airfilter is wet and water is getting on the MAF sensor