Hi, my name is***** your mechanic automotive expert, and I will be happy to assist you today. I apologize for any delay.
Dear customer, I have read in your query, the truth is that there are many things that come to my mind to review.
But I will try to extend myself and make it as concrete as possible.
First, according to the reading of the error codes you may be presenting a problem of leaks in the air intake, i observed that everything started after a job that was done to the engine for having broken the timing chain so it seems to me that there may be Intake vacuum leakage problems, this is rulable in many ways, the simplest is to use a sprayer on all edges of the intake.
Another reason may be that the EGR valve is recirculating the exhaust gases in a bad way, all this because I see that you have replaced the exhaust sensors that you have verified the DPF and that the problem still persists. Therefore, it may be that the EGR valve, It is causing problems to the admission, it may be that it is very dirty or obstructed.
I also observed that it has verified the turbo, the problem is that the turbos is best to place a test at least, like the throttle body, these components are not recommended to check by removing the saddles or disarming the power from a test bench, the most advisable thing in these cases is to simply locate these test pieces and proceed to replace them and check that this corrects the fault or not, although I know that from your position, it is difficult to do it this way, I hope you can find a friend or a colleague who can lend you.
Another thing i see is that you have error codes referring to low fuel price, this low pressure is detected by the injection pump, I am not sure if these models have an independent regulator, but I do know that the injection pump indicates when there are low pressures, therefore it would be Ideally, proceed to subject the pump to an overhaul. I see that the injectors have already been overhauled, but I don't know if the pump was too.
I think the pedal actuator has no problems so that way you can rest easy.
On the other hand, I would also take a look at the distribution time review again, as there may be some variation between the distribution taking, perhaps a tooth run, small variations do not create error codes many times.
Do you understand me, dear customer?
My goal is to give you the best advise i can, therefore please do not doubt to ask if you have any doubt or if there is anything else i can help you with.
Kind regards, Sebastian.