does anyone know what an expected lifespan of a cp3 pump should/could be? i have what I call a small surge at idle. i have read where the most common problem/solution is a fuel pressure regulator? well my truck has 200,000 miles on it, and a fuel regulator is approx. $180. well i'm thinking that if a new cp3 comes with a regulator already on it, maybe i should just change out the whole thing as apposed to just the regulator. if the pump should last for another 100,000 miles, then i maybe i will just change out the regulator. any suggestions?