Originally Posted by
beserkr
I have a 97 2.5l tj se manual trans and the vcm scanner wont read rpm at all? I've tried 12engine rpm (angular frequency) and 12engine rpm - high resolution (angular frequency) the latter reads but is an off and on reading so basically drops to zero and then back up to the correct reading which is useless. any ideas of how to get a reading? I have tried changing polling intervals but this just slows down the reading and does nothing to help with getting it to read correctly.