need help diagnosing a random miss with a weird log. Posted full details in the engine section but thought maybe i might get some gurus in here that know more about log data than i do. Random misfire for the past few days and for about a week last month. finally caught it in a log. while cruising load goes from 90ish or where ever it is and spikes to 400 or higher for no apparent reason. its at this time the car bucks and misses and the afr goes way rich. attached is one of the logs that the problem can be seen in. Im wondering if the maf sensor is on its way out. only relevant code thrown has been a P0171 system too lean.

thanks for any help!

weird misfire.csv

 

Hi mate,
In the log i didn't see the situation which you are describing.. specifically the load.

Personally i dont log 2 byte load anymore. i find it inconsistent , varies alot.
Check for leaks.