My '92 535 has lately had a strange issue. After driving hard, repeated WOT red line accelerations etc., it runs really lean after it has been shut off for a while. Last time it happened I nearly didn't make it home; It would barely idle, and giving more than a little gas it would stall. I had to feather the throttle to keep the rpms around 2.5k and change my speed using the clutch. After I got home the exhaust system made more ticking noises than usual, looking underneath revealed orange glowing cats which can only mean it was running seriously lean.
Anyway, all other times the engine runs fine. I know the injectors are leaking and the AFM is a little off, but I don't see how that has anything to do with this.
Anyone experience anything similar?
Thanks, Ulf