I've got the same problem. Lags and will not rev when I first pull into the street. I only notice this when I first pull out on the street (ie. I've just started my car). But it happens whether the engine is warm or cold. Never while I'm driving it though.

I've been running fuel injector cleaner through it with every oil change since I got it.

I was thinking fuel pump too. I've replaced my spark plugs somewhat recently, and the problem only happens when I first get in my car.

I don't believe I have a connector behind my ashtry either.

I believe the fuel pump is in the back of the trunk (near the back seat). Lower the trunk passthrough into the cabin, and remove the trunk liner from there. I think you'll see where it is (on the passenger side). Correct me if I'm wrong.

Any more suggestions would be great.