why does my 2003 hundai tiburon v6 gt coupe rev at 4000 rpms in 5th gear on an interstate doing a standard 75 mph
Try resetting your ECU by pulling the fuse in the fusebox in the engine bay for +- 10min. If it does not reset, remove the + terminal off the battery for 10min. You'll see the difference immediately when you drive again.
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