Hi
I have a 92 220te last year I had a problem of misfiring when checked the engine wiring loom was very iffy on stipping it off one of the injector cables no 4 had corroded through I rewired the loom and reinstalled it. The car started first time although it had stood for some months and idled and ran well until the temp reached 80C when the car sounded like it was running on three cylinders turn off let it cool down a little then runs fine until 80C is reached then running on 3 again. Does anyone have any ideas where I should start is this problem typical of something.

Thanks in advance for your help

Gary