[Jeepx4]

OK, we have a code reader & is wasn't coming up with anything.
Now it has after sitting for a few days, it comes up mass airflow sensor. once the code pops up it won't start again. Once we delete the code it starts back up. did thid several times with everytime we shut it down or it would shut down (after about 3 mins) it would start again until we cleared it. so then we got the sensor. it still really running properly still. I have replaced every fuse in all three boxes. they were not blown but just looked like they have been burned. I am really starting to think that it is the ECM. What do you think?