ok i checked and double checked all of my vacum lines i even bought a after market boost gauge to make sure my gauge was reading the right boost.... which it is only 10 psi then when ever i put the boost controller on it it will jump from 15 to 20 psi and wont hold a constant psi just when u let off the gas and make it hold what u want....... then when i finally get it set at 15 my engine bucks like its being cut from fuel or the timing is being retarded .......so im lost do u think maybe the bouncing psi could be from the spring in the boost controller ........
