Hello,
my 2014 Mazda3 2.2D 150HP sometimes oscillates pretty noticeably when accelerating and decelerating, and I am trying to use VersaTuner logging to figure out why, hopeful to solve this issue and flash at least the 175HP tune.
The car is stock at 150HP (with the PCM recall done) and drives fine for what it's worth, the power is still there, even though it seems to me lately that rolling from a standstill and reverse got quite rougher.
Here are some basic graphs in which you can hopefully see what I'm talking about:
https://pasteboard.co/syh8OdzDD7T1.png
https://pasteboard.co/PNtxaxrwEpHG.png
The zigzag of the blue line (engine RPM) after the accelerator pedal is pressed and released are what I'm talking about. Sometimes the car really pulls me off the backrest, like it's hitting a wall... but most of the time it feels like road bumps, yet I know it's the engine.
Wild guessing, it could be the clutch that's worn out (at 185K km, it may very well be), but I don't feel like it's slipping or anything else.
Or it could be fuel injection-related: on the last car service the mechanic told me there was some slimy matter in the fuel tank and he added some product in the tank; I've also been adding Bardahl Top Diesel every now and then, with no appreciable result.
Or turbo-related... but IDK where to start looking.
Can anybody suggest which parameters I should be looking at to understand something more about the situation?
Thank you in advance
