Hi everyone I recently purchase a 2004 subaru wrx sti in November with 139k miles one it. Well just last month I was driving the car and all of a sudden while in neutral it stalled out. When I cranked it back up the rpms were fluctuating like crazy(rpms:400-1500,1500-0,0-400) and so on it was jumping all over the place. The car has also been eating a lot of oil lately and when I say a lot I MEAN a lot.And I only see smoke come when I punch it. Took the oil cap off and see some oil spurting out. I have not done a leak down test but and just trying to get a opinion from you guys. I do feel as if my car isnt pulling as hard turbo wise. Any info helps and thanks for reading.