I have a 2000 E39 523i auto with the twin vanos M52 engine,
the problem is starts fine and ticks over fine at first but while driving it the engine has no power at all then it will start missing on cyl 1,2,3 so i turn ignition on and off and it runs again on all 6cyl ??
but if you drive car and try to take past 3200rpm it starts missing badly an other times if you manually select the gears and get it revving past 4000 rpm it seems better?? run a diagnostics on it and came up with rad outlet temp sensor and misfire cyl 1,2,3 so now changed temp sensor and coilpacks and still nothing ??
its got new plugs, filters etc all clean, no vacum leaks, no splits on intake pipes,run live data and o2 sensors are fine knock sensors ok so running out of ideas anyone come across this before or have any ideas ??
if you start car in park it will rev up to the limiter but not very responsive also while driving now and again while doing about 50-60mph it will have a sudden surge of power for a second or two then just back to no power
i am totally stuck with this one now so any ideas would be a great help ?? thanks ;-)