Mazda CX-5 2.2L Judder 1.8K to 2.5K hard acceleration - Idea's?

Hi, This is my first post, and you may say "garage" is the right answer...

But my Mazda has a very noticeable judder in 3rd, 4th, 5th, (don't to to 6th often) from 1.8K revs to 2.5K revs, if just lightly touching the peddle it will cruse without judder, but heavier pedal press, and it starts juddering.

Nothing showing from a basic ODBII Scan - I do have FORScan if we need numbers from something, but I didn't see anything in there as well.

My thinking...

  1. Clutch slipping?
  2. Drive shaft or linkage
  3. Wheels not balanced
  4. Engine to coked up, and starving / not letting something open or breath
  5. MAF (others have mention this in other posts)
However with no codes, I don't know where to start really, and with this list I wouldn't know how to check them..

I have serviced well, and never let the oil go any where near the extra mark on the dipstick, however on the last change of one of the sensors I did notice a lot of shoot (never had a clean) and its at 105K

Any one know where to start, or can help me start to work out what is wrong?
 
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