I had my GREDDY PROFEC B SPEC 2 installed today. just wanna make sure i did it right. I put a T between the hose of boost gauge and the boost controller. it works but the reading seems different. here is the picture while it's idling. any advice?

 

any help?

 

Your Profec measures in KPa, your gauge reads in PSI. .81kpa is about 12ish PSI and the profec's built in boost gauge isn't exactly accurate. You are fine, but ALWAYS measure by your boost gauge.

 

i just found another problem with it. i cant boost over 10psi. it hits 12psi then goes back at 10psi. any advice? my unit is used, so is there any chance the boost controller is not functional? my settings are 50% boost, set gain 15.5 psi gain 10% warning 21.5psi cut 4%. the only thing i have on my car is the greddy type-s. i had the MBC on and it works fine.