just bought 95 wrx sports wagon and its lost power,turbo seems fine not blowin any smoke or makin any noises but engine ticks ovre sweetly i thought i narrowd it down to the dump valve but have been told they r bullet proof does this problem sound fammiliar to any1 at all??? this is my first scoobi and knnow nothing about them apart from you need chopsticks to work on them!!! can any1 plz help