Originally Posted by
cali
Your problem is right there in your post. The PCM has no correlation between your boost and BOV solenoid. One is PCM controlled while the other is not...
Look closely at the BOV(pink/blue line), it goes thru a solenoid. When you press the gas, the PCM switches the solenoid to route the blue-line into the pink line...therefore sealing the BOV. The blue line is the HIGHEST pressue source in the turbo, thats why its used for the BOV, to ensure its sealed at the slightest boost.
When you get off the gas, it removes this pressue and you hear the pssh...the reason you hear in vacuum is because of your WGA. The WGA is causing the car to hold boost EARLIER than the PCM expects....so pshhh..
All my lines are routed as stock. Every single one. The only thing I did was cap off the black line that would go to the WGA... I left the line there and just capped it off. I "T" off the green line and ran a hose from that to the WGA. Non-PCM controlled boost.
The BOV was still doing what its doing now when the WGA was PCM controlled. The problem is that now its more prone to PTB. It also did it when I was on the stock WGA w/just the blue plate no other mods/bolt-on's... all stock vac lines.
Everyone I've spoked too, even on a completely stock setup... meaning all they had was a blue plate. Said the same thing that they would get the small psh or tsh sound under vac. I experienced the samething when I only had the blue plate and everything else was stock. I don't think its install error because like I said I installed it just like the instructions from Mopar said and these are the instructions that can be found online as well. It's not leaking either atleast it wasn't about a month ago when I had a boost leak test down.
So I can understand one being PCM controlled (BOV) and the other not being PCM controlled (WGA). But I don't understand how your saying its the WGA causing it but when I was on the stock WGA with no mods besides the blue plate it was still doing it.