Weird Wastegate Problem..HELP!!

[supa89]

I recently installed a turbosmart external wastegate "Ultra-Gate38" with a dump tube. I now realize at idle my dump tube is blowing. Why is that?, I know i'm not building boost when the car is at a stand still just idling. The car works fine and boost to 10 psi but why is air coming through the dump tube?
Also I turned the boost up to 15psi and it will only give me 10psi. I did a boost leak test too and didn't find any leaks. Is this problem related to my wastegate issue as stated above?
How can I resolve the problem of when the car is at idle you hear the exhaust leaking out through the external dump

Thanks..

 

[thiazole]

You should list your mods somewhere. Make sure the hoses are hooked up properly. Also, there is a metal ring (valve seat) on the inlet that needs to be in place when you install the wastegate. Without that, I think it will do what you are seeing. Also make sure it is leaking out of the wastegate and that you don't just have a leak before the wastegate somewhere.

 

[supa89]

Updated my profile

 

[thiazole]

If all else fails, pull it apart and make sure the diaphram between the spring(s) and the exhaust isn't torn. Use a vice to put it back together or you will have a hell of a time.