So I have had my TSX for a year now and I love to rev it. The power has always been really smooth and constant. However, I had to park it for about two months. Now I'm driving it about 2 days a week and I have noticed a couple times that there is a little blip in power when I'm accelerating. It doesn't happen every time and it happens at different rpms (3700 and 5800 for example). What could be the cause of this? should I take it in and let the dealer look at it?? May be unrelated, but I also noticed I had a rattle coming from behind the dash on the driver's side when I'm in neutral.

 

Same here. It is not always present and but when it is, it is clearly audible. I hesitate to call it a rattle because it is quite different from that most have experienced witht the dash/steering column, etc. However, as you described, this rattle-like sound definitely seems to come from behind the dashboard, but not sure where in the engine bay though.

I have a 5AT and so I can hear it even with the shifter in D and at a stop.

Can't help you with the power. Anyone?