Citroen 1.6 hdi-side and after 3 seconds turns off

[adelettromeccanica]

Hi all, arrived yesterday with the wrecker this Citroen Xsara Picasso 1.6 hdi 110 cv EDC16C34 HW: 9653958980 and SW: 9656841180
this car has been replaced the engine with a used one is always the 1.6 hdi but with 90 hp, the car was good, but in the street when they fix the throttle gave error high-pressure fuel P1166 and went in protection not exceeding a certain number of revs of the engine until you clear the error and start all of the ac****. then they had the brilliant idea to map the ecu by lowering the pressure of the rail, and after writing the file to mod the car part and after a few seconds it turns off, if I try to accelerate instead shuts down immediately.
Then the first thing I made to give the original file and read the first time and I rewritten, but nothing changes, still now error P1166, I have changed the high pressure pump with its pressure regulator, cleaned the tank and there are air bubbles in the pipes of diesel.

according to me it has some problem with the ecu, but being a novice with the ecu I don't know how I can verify it, or better to solve this problem, can you help me with some idea?

p.s. I checked the original file with ecm titanium and everything seems normal.

[fabius8585]

you have to change the sensor rail pressure on the fuel injectors

[Alfiuccio]

check the connector on the sensor rail pressure