Originally Posted by
geo53PSI
Got it figured out! Rookie mistake on my part,was one of those moments.
When you mentioned the possibility that the compressor was applying pressure to anything, it turned on a light bulb.
Before adding the compressor I had a bleed boost control on, it was hooked up to the side port of the gates. As you can imagine when the compressor would turn on and apply positive pressure to the bottom port, the gates would open completely and the wideband on the downpipe would read lean at idle.
I turned on the compressor with the car on and bled the air at the regulator to keep it from sending any air to the wastegates and the A/F stayed correct.
Just have to setup up the pressure lines from the regulator to the wastegates correctly and all should be good.