After a bit of help or advice please

My 2014 doblo 1.6 jtd runs but will not Rev past 1200 it splutters and cuts out
The only fault code is P0335 RPM SENSOR - have resistance checked wiring and changed sensor from a running van. There is also a lot of white smoke on idle.
I’ve checked the timing and this is 100% correct
So abit of background - this van would not start at all, changed the fuel pressure regulator it started straight up and will tick over all day but as soon as you Rev it the engine stalls and sets fault code as above!
Any help would be appreciated I’m at my wits end with this.

Hi

No history.. bought as a non.runner ?

White smoke.. maybe overfuelling ( not metering air properly)

Inherited it from my dad! ?

He parked it up for 6 month and this is the state I got it in.
I’m thinking maybe injectors partially seized.

Was it parked where there was a possibility of mice?

I had a little rodent chew the blank on the vac pump last year.
No vacuum means no turbo control so although it would tick over fine, it wouldn't rev in neutral, with lots of smoke, and it struggled to get to 50mph.