I was having the same problems with my turbo xs mbc. It wouldn't hold my turbo at any pressure consistently. I ordered me a new apexi avcr off of ebay sunday night. I'm hoping it will hold better. I've read that boost controllers aren't really designed to hold boost as much as their for making your turbo spool sooner. I think our wastegate is supposed to keep it from spooling too much. If this is wrong I'm sure someone will let me know. I think I'm having problems with my wastegate and if the new ebc doesn't help then I will take it off and have it worked on. Hopefully it won't come to that............lol
What is your wastegate set at. Mine is supposed to be set at 14 psi, but I hit 18 when I was dynoing............lol
What is your wastegate set at. Mine is supposed to be set at 14 psi, but I hit 18 when I was dynoing............lol