SL9200 0 Report post Posted May 8, 2023 (edited) So got a 94 e36 sedan that was manual swapped got this odd ball thing where it wont rev past anywhere between 2800 to 3000 rpm checked crank sensor cam sensor vanos and then it went to a shop they cant figure it out probably because they didn’t swap it or even deal with this stuff on the normal but is there a chance that some of the wiring that the previous owner did could be the problem im here just helping someone trying to see what im up against because i would rather just find a full manual harness and dme and just swap that as well but not to sure how that will flow over the owners head Edited May 8, 2023 by SL9200 Fix miss type Quote Share this post Link to post Share on other sites
dirtydoogle 383 Report post Posted May 8, 2023 Most likely not related to manual swap. Has it been scanned? There are so many potential issues. How did you check Cam/crank sensor? And have you changed the cam sensor at all? (Tgere are 3 different types) Quote Share this post Link to post Share on other sites
SL9200 0 Report post Posted May 8, 2023 1 minute ago, dirtydoogle said: Most likely not related to manual swap. Has it been scanned? There are so many potential issues. How did you check Cam/crank sensor? And have you changed the cam sensor at all? (Tgere are 3 different types) Okay so the thing we had done prior to the shop was check all the ground we could find and got new crank sensor cam sensor aicv vanos and it still did it after the shop tried a couple dmes to see if that would fix the problem no changes appeared but in the past wile he drove it it would just randomly fully work like full rev range and then just cut out back to where it was so thats what leads me to someone butcher job on the auto harness look tbh im not to familiar with bmw but i have done some ls400/sc400 manual swaps and I really cant imagine its going to be to difficult to spot the issue with it but on the pre obd2 bmw that where auto if it was in “park” is there a set rev limiter for park as opposed to “nutral” Quote Share this post Link to post Share on other sites
dirtydoogle 383 Report post Posted May 9, 2023 Nothing I've come across on the manual swaps that would do that, only thing close is a missing ABS/Speed signal, and that lowers the limiter to 5ish from memory. The cam/crank sensor issues will, 99% of cam sensors you can buy locally are for the M52 and can potentially cause the same symptoms as broken wiring in the original sensor (sporadic RPM limits) A proper scan with live data will show it. Or using an oscilloscope Other common thing is a very specific MAF failure, yet again a scan with a knowledgeable diagnostic chap will show that. Quote Share this post Link to post Share on other sites
