NHTSA Complaint #11421294 — 2018 SUBARU CROSSTREK

Purchased used in August 2019 - Premium 6MT. Issue has been present since purchase. There is hesitation with acceleration, not only with extremely slow acceleration, but jerking and surging at times. Dangerous when trying to pull out into traffic and driving in general. Appears to be an issue mostly between 2k-3k and then seems to rev properly after 3k, but have noticed jerking up around 4k and over. Had taken to dealer several times before issue was reproducible, then told to be issue with buildup of carbon in fuel lines. Had fuel lines blown, problem lessened, but did not resolve - this was roughly a year ago, problem has continued and worsened. Changed air filter with no change in problem. Multiple other owners on Subaru forums have this same issue, as well as have posted on this website. Subaru needs to recognize this as an issue and resolve. No dashboard lights appear, no sensor issues have been reported. There is also a "knock" or "bloop" sound that comes from the passenger rear of the car, near the gas tank input, when pulling forward from reversing. Not sure if that is part of issue, perhaps too much air is getting into system? It's a very annoying issue; if I had known, I would have kept my Jetta.