lml duramax defuelling..

I have a 15 duramax, cp3 swap, 65mm turbo, fass, & a sump. however I've just about tried everything & no matter what it still defuels during WOT. I'm not running my own tunes at the moment. still trying to build up the courage to write my own. if only there was a way to tweak the tunes I have now lol. I've heard that the tunes I'm running could have too much pulse width. Any insight would be very helpful!

Have to data logged? If so what does rail pressure look like before the de-fueling? Are you using stock injectors? Could be hitting the rail pressure relief valve..?

Hey DK if you could email me I have a couple questions for you mwesley700@live.com