Osei Posted April 5, 2021 Share Posted April 5, 2021 (edited) 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. Edited April 5, 2021 by Osei spelling Link to comment Share on other sites More sharing options...
All_talk Posted April 5, 2021 Share Posted April 5, 2021 If an ECU reset fixes it temporarily, I would look at changes in fuel trims between reving and not reving. Will it rev passed 4k at low throttle/ no boost, i.e. in closed loop? Link to comment Share on other sites More sharing options...
Osei Posted April 5, 2021 Author Share Posted April 5, 2021 Non turbo. I can see fuel trims, but I don't know what I am looking at or for. Will start to flutter at 4100 and will not go further. Will scan tomorrow and post results. O. Link to comment Share on other sites More sharing options...
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