Ive wired up the hks evc v and now it doesnt hold.boost. I fink im doing something wrong with the ebc. Diaphragm has been checked no visible cuts or rips, just slightly rubbed on the vacuum nipple. Ive wired up the hks evc v and now it doesnt hold.boost. I fink im doing something wrong with the ebc. Diaphragm has been checked no visible cuts or rips, just slightly rubbed on the vacuum nipple.