2006 Forester XT 6 speed
Hey everybody. I finally got my car on the road and am in the process of E-tuning. We got it running pretty good and decided to start adding ethanol into the mix, car has flexfuel. At E35 I have an aggressive hesitation in 1st and 2nd gear as boost comes on or once in boost. Tuner thinks it is spark blowout and recommended new coilpacks and to log roughness on all cylinders. The pulls showed roughness in cylinder 1. I was running NGK LFR7AIX one step colder iridium plugs gapped at .028, only 1000 miles on them. I checked them and they all looked ok, I gapped them down to .025 and moved the plug from cylinder 1 to cylinder 3 and the coilpack from 1 to 2. Logged again, roughness in cylinder 1, no change. Replaced the coilpacks anyway, since they have 243K on them, now I don't have any roughness in the logs but the problem still occurs exactly the same. I swapped out the Iridium plugs for coppers gapped to .024, tuner said gap should be .024-.028, no more, no less. No change. I've attached some logs of the issue, 2nd gear pull. Sns only R is wideband. 3rd gear pulls clean from 2500 to redline. The big thing that stands out to me is the FP Diff Comp, but I'm not sure exactly what it means. I plan to take it to a shop to get this diagnosed at some point but until I can make that happen with my work schedule, I wanted to see if anyone here had any ideas that I can try on my own. Car had a predyno inspection done, and passed with flying colors, compression and leakdown were good and no boost leaks. Car has an FP Blue, ID1050x, Cobb FlexFuel, Aeromotive 340 stealth, 38mm EWG, TGV deletes, ELH, Catless DP and 3in catback. Thanks in advance for any advice guys!