Hey guys! Picked up a 2008 accord V6 auto sedan with 245,000 miles a few months ago, and it has been an absolute headache with this one issue I’ve been stuck on. When driving it, it won’t rev past about 3500-4000 RPM. In neutral at a standstill it’ll rev freely, but when driving and flooring the throttle in any gear, it’ll get to around 3500-4000RPM and stay there until I let off the throttle and then it shifts (pretty roughly) into the next gear. There are no codes at all. When I bought it, the trans fluid was extremely low, but I filled it and took it to a mechanic friend who hooked up a scan tool to monitor activity while driving, and he didn’t see anything out of the norm. He thought the trans was just burnt up from being run without fluid and that it needed a new trans.

replaced the trans with a lower-mile junkyard trans (but reused most of the old sensors aside from the shift solenoids) and of course it’s still doing the same thing. For background, I started off thinking it was an engine issue so I made sure the VTEC solenoid screens were cleared, replaced gaskets on VTEC solenoids, changed oil, checked spark plugs and coil packs. I’m thinking it could be one of those sensors is bad, like maybe the fluid pressure sensor or the clutch pressure control switch, but I’m just sick of throwing parts and effort at it, and everyone I’ve talked to is stumped on it. Does anyone have any idea??