2021 MX13 pac car dpf and scr efficiency issues in need of egr tuneup

[mikkhh]

Second same year mileage usage truck was waiting for some parts so decided to pull the egr cooler on that one and also intake mixer.

The inside was nowhere as bad as I would have imagined. Picture is attached. So there is NO NEED to pull the head to clean the head. I was wrong this time and overreacted... Sensors should be checked yearly though, since that does not take much time at all.

Doser injector looks not the best, but going to clean it since new OEM is eqvuivalent of 1000usd around here, probably will get cleaned with air and brush or will try ultrasonic cleaner on it. I have used ultrasonic cleaner before with great success on gasoline fuel injectors.

EGR cooler got pressure washed, this soot falls off easily due to no coolant or pcv oil present unlike on small cars (usually they do not have PCV filters).

Since there are two same usage same configuration trucks I will test to see if there is fuel mileage imorovements with one that has just the sensors cleaned and new IMAP VS the one that has intake mixer and egr cooler cleaned + doser injector cleaned.