I am having some trouble tuning my turbo TBSS. Everything was going good. I was tuned on 8 psi and everything was working fine. I go make some passes and all it wants to do is lean out and pop out of the exhaust. Like shotgun loud. This tune was good enough to make some good power and now it sucks. I am thinking it is my fuel pressure regulator or something. No matter how much fuel I add to the be table it always goes lean. My setup is 80lb siemen deka injectors, dual walbros, -8 feed and stock feed as return, 4.8L motor with LS2 cam, single 78mm turbo, 2.5 bar sd enhancement.
I am thinking it has to be something mechanical and no in the tune, because no matter how much fuel I give it, it doesn't richen up. Attached is my tune and logs.
Thanks,
Jacob