05 2.5I, MT.
Recently starting getting inability to rev past 4K.
No stumbling or anything else until I get just past 4k.
Occurs in any gear.
Have access to an Autel scanner, but so far can't pin it down.
Does not seem like fuel starvation, but what do I know?
Nor like a partially clogged cat.
Unplug the TPS at TB ( DBW). After a few minutes of learning, it revs to redline, but after 5 minutes or less of actual driving, it starts again.
No codes, so am at a loss.
Suggestions?
O.