Hope some1 can help car is really hard to start and when does sometimes is in limp mode and won't rev over 2500rpm and sounds like a tractor and it's in limp mode sumtyms it cums out limp mode bt when ubtry drive it under load it goes back into limp mode and no acceleration and wants to cut out any1 help what to check plz 

Limp mode should trigger a fault code.

There's no fault code cumin up mate had it on a snap on machine. The engine system message comes up and red light but no fault code

could be it needs a new fuel filter but it's a bit of a wild guess really. blocked fuel filter could cause that, but when my 1.6tdci had problems which the new fuel filter fixed, it did have fault code for low fuel pressure.

It's annoying as a just put new engine in and had it all coded up by ford now it's hard to start and when does it's like it's running lumpy and has a diesel knock like it's missing if u stand at bak of car u hear like a bak fire ***** oot the exhaust if u get what a mean then sumtyms it cums out of limp mode and when u rev it up over 3000rpm it cuts into limp mode and won't rev over 2500rpm and sounds ruff