AW11 Drifter is giving some good advice. Since your hose has been popping off, that prolly means you were bleeding boost, now that the pipe is connected properly, you are probably holding more boost. You may have to re-adjust your wastegate. Also, you may want to check your vacuum lines going to your boost controller, if one of these is off or has a hole in it, you might not be limiting boost at all, which will cause the wastegate to remain closed. I would check all your vacuum lines, make sure they are all attached. I just replaced all my hoses, and it seems I have been leeking boost for over 6 months now. It makes a bid difference when there is no vacuum leak.

The td-06 is notorious for boost spike, like AW11 Drifter says, you are gonna need a lot better boost controller, such as the GReddy Profec B, or the new Blitz gimmick. I suggest running 12-13psi max till you can get a better controller. If you want to hook up, I can take a look at it, and we can F around with it. I'd also like to check out your car, as I love MR2's, and your car sounds nice! Just let me know, and try these things out.