TURBO XS boost controler problem

I have the turbo xs boost controller and i had the boost set at 15 psi for a long time, then when i got my new exhaust the boost level jumped to around 18 psi. I tried turning the mbc down but it doesnt do anything, it is like it is not funtional or something. I turned the bolts all the way down and it did not affect the level. Does anyone know if removing it and doing somthing would help or if it is just broke?

if you would have done some research you would have found that turbo XS is not the best idea for a boost controller on a 4g63. but here we are anyways. when you upgrade the exhaust you run the risk of boost creep, which is the complaint of the turbo xs BC.

ok hardass, actually the guy i bought the car from had the turbo xs boost controller as his only mod so chill out, i dont know everything like you do. All im asking is if anyone knows what is wrong with the boost controller or how to fix it.

so then.....what is the best Boost controler for a 4g63?

Apex BC, Greddy BC, HKS, Blitz, theres alot. but its all up to how you wanna run your DSM.