I'm having a fueling problem as soon as the manifold pressure goes into boost and I haven't had any luck getting it to change when I make adjustments in the PE enrichment and / or boost enrichment tables / settings. I'm running a 2 bar SD tune and I have the waste gates set at about 4 psi to start with figuring to work out fueling and timing before adding any more pressure. Prior to the addition of the turbo's I ran the engine with an enhanced SD tune and it ran great with good AFR control. I migrated to the 2 bar SD, and used the values from the NA tune and just modified the boost areas where required. Nothing has changed on the engine except for the replacement of the 1 bar MAP with a 3 bar MAP. I just run this car at the track so I've only had 6 runs with it, but there's something going on with the fueling that I can't seem to correct. The wide band accuracy has been verified and the MAP values are the same as the boost controller values (separate map) so I can't see it being a sensor data error. The data log shows a big drop in AFR with the wide band as soon as I get into boost and it stays that way consistently. The commanded AFR does not have this drop. Because it changes so quickly I can't see any real cause for it in my tune. I found a old post on the site that had a similar issue and it turned out to be a problem with the boost enrichment but i can't see that its a problem in the tune. I've attached the tune and a data log. Any help / comments would be great, I'm running out of idea's.