boost spiking

[fenderguitarist]

i hooked my exhaust up yesterday i was running just a downpipe when i had it setup that way the wastegate would open at 7 psi now that i hooked up the exhaust im spiking boost all the time some times it will go up to 17psi then come back down to 10 i changed the actuator and that didnt do anything im wondering if its cause im teeing off the wastegate line for my ssqv? any help would be appreciated

[the converted]

Yeah it has to be before the throttle body for pressure signal.

[fenderguitarist]

dont have the vacuum port on my hot pipe so i have to run by the throttle body thing is it was running its stock 7 psi now it just goes where it wants looks like i gotta drill a hole in my hot pipe

[fenderguitarist]

i also got a pcm valve type thing with my motor swap it came attached next to the ignitor does the pcm have something to do with the turbo and should i hook it up?? i cant seem to find info on it anywhere