Hi my 98 subaru legacy outback stated studering almost to the point that it wants to stall out. I ran the scanner and I got two codes o440 and one that said my #3cylinder is misfiring. Could the EVPA cause the car to studder or the misfiring #3 cylinder? Please help. If it the EVAP then I can go to the dealer and pick one up. If it the misfiring then at least I can put a bullet in the car.