Boost Oscillating

This is typically what my logs look like WRT manifold pressure (black line), load (upper black line) , throttle position (green), RPM (red) and AFR (blue). As a reference the manifold pressure peak is about 250 kpa and "valley" 225 Kpa

Since my last post I have re-fabricated the down pipe, I considered that the EWG plumb-back was too close to the turbo creating back pressure issues when the EWG opened. I went out to test again today with the new down pipe but there has been no improvement.