I have a 2003, pre june 2003, 03 plate mondeo tdci 2.0 130, it has had the injectors replaced, fuel pump replaced, fuel filter replaced and injectors programmed, it starts and runs very rough like only on 3 cylinders or something but when you switch it off and restart it it runs a lot better but still missfires at mid to high revs, the fault code that comes up when started the first time and running rough is P0200, once stopped and restarted there are no fault codes, it has the EGR valve blanked off, i had it ticking over and when i unplugged the MAF sensor there were no changes at all, surely it should make a little difference as other cars when i've done this they've spluttered on then cut out, any advice/help would very much appreciated.

Thanks

Dan.

P0200 is injector circuit malfunction , commonly caused by electrical issues.

Any ideas as to where i should start looking?

MAF?

EGR?

etc

Thanks

Dan.

As Mark has already said - P0200 is injector circuit malfunction. First place I would be looking is at the wiring loom for the injectors

M.A.F. is a suspect if when unplugged there's no difference - try GENTLY cleaning with isopropyl alcohol or electrical contact cleaner or replace.

Unlikely to be E.G.R.V. if it's blanked off.