injection problems

Hello, I am new in the forum, I have a Hilux 2.5 TD mod. 2006 since I bought it that I have problems with the injection check, the witness of the board is turned on and the engine loses strength, I turn off the engine I turn on again and it is working normally until at any time the witness of the injection check is turned on again.
When they scanned it the first time, it accused exesive fuel leakage, they cleaned the pump and changed the flow regulatory valve, cleaned the injectors and the ramp and changed the Oil gas filter. Anduo almost a month until the same problem returned.
They returned to Scaar gave the same fault, calibrated the 4 injectors, repaired them and changed 2 platelets of them, Andubo 15 days, now it makes the same fault they tell me to try to change the filter, which must have some garbage spinning, the Scaner pulls Stanqueity failure in the fuel system or something that is no longer what you do.
If someone can advise me about it, I'm going to burns it.

Hi Sergio. In these systems it is very common if they throw escape codes in the high pressure system (P0093 by eg) and is intermittent at the beginning ... Review pressure limitation valve on the rail. It is a mechanical valve, which is connected to the return of the fuel feeding system. With the engine running, with the failure, disconnect the hose or duct that communicates the valve with the return ... There should be no fuel, if fuel comes out, there is the loss of pressure detected by the engine control unit that, losing efficacy in the modulation of the pressure of injection, generates a code, protects itself and especially to the propeller .... leaves you with pressure and flow of reduced injection.
I have seen people who, when detecting the fault in that valve, closing it ... serious risk, the designer engineers put that pressure limiting valve in the rail to prevent PICS or maximums of unforeseen pressure from the system can damage it or the motor or the engine in a cadastropic form ... it is very delicate to inhabit fuel to such pressure and presents on the head of a piston of a motor Chili.

Hello, your problem is in the injectors are with little flow when not only the platelets are repaired and the third stage are changed but also the springs that suffer wear and you have this type of fault greetings