- just bought a 2005 320d from a auction sounded fine on tickover and revving while stationary
However...
When driving it intermittently throws up the engine management light and this is accompanied by a loud knocking noise from the engine
Tends to happen at 2000 rpm and above and has to be under load ie won't happen if you rev it stationary
If you turn her off and on again she could fine for 1 mile and then do it again or might not happen for 50 miles!!
Runs perfect at idle
Fuel rail high and low pressure sensors have been replaced and injectors tested but still no different
These 3 codes were coming up
4203 glow control unit
4890 rail pressure monitoring on enginestart
4560 rail pressure plausibility delivery controlled
Any ideas??
Thanks in advance!!