I have a 09 G8 (l76) that ive been through several tuners with and noone can seem to get it right, so i decided to get myself HPTuners and try and learn the ropes. Thus far the only thing ive tinkered with was the MAF curve, as my fuel trims tend to go negative, still trying to get it dialed in. I only really have 2 issues with the tune, WOT is great, higher RPMs are great, but if I give it a rev from neutral or clutch in ect, from idle the rev will seem to hit a wall in the 1300-1500rpm range, drop a little, then bounce up a tiny bit more back to 1500ish RPM. Id have to assume its something to do with either A: my blowoff valve opening and messing things up (procharged) or b: something with timing, but I could be completely wrong, as i really am not that confident with what im doing just yet. the second issue is breaking up also around 1500-2100rpm that only seems to happen when your at very low TPS input that seems to go away when i reflash the tune for whatever reason, Id assume its some learned parameter messing things up, and my fuel trims were out of wack, -15-25% at times setting the CEL. Like i said im slowly working on getting those dialed in yet. Car is MAF only from my understanding of looking at the file, as dynamid airflow enable/disable values are 300-200RPM. I read somewhere that the car will still referance the VVE table still though, which that table looks ROUGH, peaks, vallies, ect. The biggest valley is where im assuming someone took a lot out of it when the BOV opens up, as its at a very low Kpa and around 1800-3200rpm. If anyone is able to point me in the right direction, id appriciate it, Like i said im about a week into having HPTuners, and ive been doing nothing but watching videos and reading forums on how to-s. because at the end of the day, im the only one who can log it consistantly and dial it in, and hopefully not blow it up in the learning process lol. In the log file, you can see at 05:42:33 i give it a wack to around 90%TPS and instantly back off of it, and it has some strange RPM behavior, maybe im crazy but id expect more than 1400RPM out of that.