I unplugged the breather on the left side of the car and fashioned an air filter by stuffing half of a lawnmower filter into a pill bottle and drilling a bunch of holes in it. That seems to be pretty solid.The car ran perfectly on Friday night, got up the hill to the rallycross site fine, and did a perfect parade lap. About 1/4 of the way through my first run, though, it just crapped out. Seems like its not running on all 4, but more diagnostics are needed at this point.