I have had my PSE modded to always on for about 10,000 miles, unmodded it today (just re-attached the little vacuum hose). I've heard stories of how keeping it on all the time can cause it to stick, well it didn't, it went quiet straight away, but it seems to be staying that way. I can't really remember how it was when I first had it fitted un-modded but it doesn't seem to get noisey at all now, even at high revs. Does the little hose need blowing through or something?

And I suppose this is all in my mind but the car feels quicker now, probably just imagining it because it sounds different.

brad