This is message of my friend:
Could be AFM ?Hi guys, Im proud owner of E34 M5 1989 with S38B36 engine.
(sorry for my english) Once few days ago I drove my M5, engine seems a little lazy than normally but I wasnt solving it anyhow while driving when engine suddelny got "problem". Since that time Im unable to solve it.
My problem is: Idle rpm went from 1000 to 250-500 (poor engine) and while increasing trottle, engine has tend to choke itself or totally tunr off. Doing while cold even why warm engine.
I tried to change fuel pump and fuel filter cause is looks like problem with lack of fuel... Nothing. Now I have in plan to try change HAL sensor and ignition coil... But I would like to ask if I should or someone has already similar problem solved? My ignition coil has resistance between inputs 1,1 ohms and it should have 0,36. But Is so small R meteable?
Thank you for help or advices