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I believe the tune is MAF based as I have the stock MAP which only reads up to 5 psi or so and Open Flash knows it the stock MAP. As you apply throttle and remove your foot off the throttle and decelerate do your STFTs vary a lot and go high positive?
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Looking at my log, STFT stays at 0 when I'm off the throttle. A lot of this seems tuner specific. I hate to be the one to do it, but I'm going to recommend that you either go Moto-East or Delicious Tuning. Their off the shelf tunes aren't full of nearly as many problems. I'm sort of inclined to believe that this may be more of a tuning problem than a physical problem.
I know it's a bitch, but EcuTek allows for so many more datastreams to be monitored. I was in the same boat - I have both OFT and EcuTek. The reality is that Moto-East @
moto-mike and @
DeliciousTuning have much more experience in the field. Maybe they will comment and help with any ideas.
However, I don't want to completely eliminate MAF scaling or exhaust leak as a possible issue.
Looking at your boost levels off the gas at near maximum rpm, you're pulling -11psi which is exceptionally good, so I'm inclined to believe that it is not a vacuum problem.