I haven't changed the fuel pressure regulator. Sounds like now may be a good time, considering the one in it looks like it's the original one, and I might as well but new injectors too.
Another thing I forgot to mention is that the car smokes now...white smoke all the time and black smoke on the highway. That is what I've been told from people driving behind me. I'm not sure what that means.
By the way, I love the 400e
and especially the fact that it has better fuel consumption