I’ve got a problem with my s8 ecu, its gone into limp mode runs very rich and hunts at idle, when I plug in my lap top an error message 41 comes up with the message “fuel pressure or mapping problem”, I have changed the fuel regulator but no change then I disenable the lambda sensor which is for closed loop fueling but still no change. I have renewed the coolant temp sensor and air charge temp sensor and have tried a different map sensor. Now my question is there a possibility the map can become corrupted, so it’s just a case of having the map looked at then my problem can be fixed, or maybe I have a problem with the ecu which if that’s the case then I will just go back to an L8 or P8 ecu . I do hate these sorts of problems i would rather the car not run makes it easier to fix the problem .
Another question what do you have to do to a L8 or P8 to run 750cc injectors and a coil pack.

Thanks