I installed my turbo kit a few weeks ago on my 2000 gs-r. Ever since i installed it i have had a problem with the car bogging down alot. My boost gauge stays at about 10in hg in vacumm and won't drop any lower, so i figured i had a vacumm leak. After checking all of the lines and not finding a leak i bought a vacumm box and installed it last night. I hooked up everything except the bov and wastegate and the car ran great. As soon as i hooked up the wastegate and bov is started running shitty again. So i disconnected the wastegate and it ran fine so i know the issue is with the wastegate. I have the vacumm line connected to the nozzle in the middle of the wastegate and the top hole is open ( i don't have a ebc). When i put my finger over the top hole of the wastegate it's drawing air in. With my finger over the hole the car will run fine. I thought the top hole should be left open unless you are using an ebc. Do i have a bad wastegate?

 

you are right on how it works for the vacum lines but as far as the "bad wastegate" not sure sounds like it to me

 

sounds like you might have a tear in the diaphram, the chamber is supposed to be sealed, that is most likely what is causing your problems

 

If i open it up will i be able to tell if there is a tear

 

it should be pretty easy