I recently bought a 2002 wrx. It starts very hard and it doen't idle very well. The person I bought it from had alot of add ons including up pipe, complete exhaust, top mount intercooler, intake, and blow off valve. He said that the ecu was tuned for a larger turbo. It seems to be running very rich becuase when I pulled the plugs they were trenched with gas. I was wondering what would be the best way address the fuel pressure? Adjustable fuel pressure regulator? Or does it need to be tuned? Any ideas would be much appericated.