Quote Originally Posted by jick.cejoco View Post
Maybe a good mechanic or better yet a good technician. What a shame.
The condition can be observed and diagnosed with an engine analyzer os oscilloscope which we have been using since the seventies. Maybe our automotive schools only train students to be parts replacers😟.




The ignition, fuel and some mechanical symptoms can be seen like an EKG to an experienced physician.



So much of that, ask to have the PCM scanned again, this time record the STFT and the LTFT ( short term fuel trim and long term fuel trim respectively.
If only a mazda center is near here i will go and have it scanned but its too far and the car is behaving very bad and i might damage it more travelling that far...

Thanks for the advice and find a shop who knows that fuel trim... they dont even know where to start troubleshooting even they know whats my problem... and now my cat is broken due to using it travelling to find a good shop