So after swapping my ecu cause i had burned parts im slowly getting back to square one with this car. Rough idle has come back after a few days im getting intermittent hesitation. I know its not ignitors or caps n rotors or plug wires doubtful of fuel pump issue changed fuel filter. The ecu swapped came out of a sc400 that ran fine so what ever specs that were in it were correct. So what is going wrong that the ecu is learning over time that is failing. Any guesses would be great.

Maf changes when plugged and unplugged which sensor is the one before the egr.