HEY GUYS, I have a bad abnormal vibration on my 93 318i 5 speed. The check engine light came on and the code read P1174 Fuel Trim Adaptation Additive Bank 1 Malfunction. I understand a little bit about it, but I am trying to come to a good solution instead of doing a million try-to-fix-it possibilities.
Had anyone had this problem before? how did you fix it? I've done some research and it maybe that it could be a vacuum leak or maybe an oxygen sensor.
Just for reference, I noted this abnormal vibration a while back, but it was not that noticeable, then it grew as time went by and the engine check light came on. I may have a theory that it could be a vacuum leak from the crankcase ventilation valve to the top of the cylinder head cover vacuum line. what you guys think?