Hi all, as above I'm curious what you all think. Its tuned to 14psi @ 302rwkw. When I give it a boot full I notice the boost pressure go strong and hold 14psi then drops to 9psi and back up to 14psi a few times. I have traction on but no traction light comes on when it happens. Its only started the last month that im aware of. Mods are fairly standard for a BA xr6t - 4 inch dump to twin 2.5 - bosch 1000cc injectors - walbro 255 lph - plaz valve springs - sct tune (xcal 4) - pwr intercooler with stock plumbing Have not done the flapper mod as the tuner never mentioned it. So under the impression boost was controllable during tune. The dyno print out for boost was smooth with no spikes.