Originally Posted by gm5oh (Post 3472870)

Hello,

Does the ECU store any data specific to engine performance after shut down (i.e. misfire count, flkc, etc.) that is used later down the road if these counts surpass the designated threshold to trigger CELs? Obviously, after a reflash these things are reset.

Any positive feedback would be appreciated.

Thank you

Originally Posted by steve99 (Post 3473087)

Yes stores a bunch of data
advance multiplier
fuel trims
misfire counts
time dtc on
starts since reset
cels since reset
and more




all of it appears to be reset when reflashed or ecu reset
and a lot are clearedcwhen dtc codes reset