Jerky acceleration, need a little help. :-)

[Despicable Me]

Hi there.
I looking for a little help.
I have a Mazda 3 Mps 2007 all stock, bought it 7 months ago.
When I acc, it feels very uneven, it happens i 1., 2., 3. and 4. gear (not 5. + 6.)
It happens in the stock map and i have tryed the fuelsaver map 95, happens there too.
If gives no error codes.
The log file is from my Cobb Accessport v3.

The problem started after the battery, was unpluged for 2 days.
After the problem started, I have done this, with no inprovement :
MAF sensor cleaned,
MAP sensor cleaned,
Throttlebody cleaned,
New NGK Laser Iridium plugs (ILTR6A-8G),
New O2 sensor (front/top one)

Can anyone check my log file, and see if there is anything "wrong"

Kind Regards,
Carsten Jensen
In Denmark

[Jeff23spl]

metric units are hard to figure out but at least 1 thing i can see is your short timer fuel trim in the 25-35%....You have something from there, either a leak between maf and turbo or bad maf reading or calibration in the tune...is it stock intake ?

[Despicable Me]

Thank you, yes it is all stock, no mods.

[Jeff23spl]

with oem air box it is a bit strange to get those fuel trim numbers....It is probably near to trigger a too lean afr code but i don't know the exact parameters used by ecm to detect it...

unless you are really familiar with the supplied metrics units, you should adjust your ap parameters to imperial units and take another log....
fuel pressure is also jerking at some point but it is hard to tell if it is the result of something else making the engine to jerk (more likely) or if it is the reason why...

I would check for the leaks and also install 4 new spark plugs with proper gap off 0.026-0.028'' and check compression while being there (it is nice to have references to monitor engine health over time)
And test again...

[Despicable Me]

Hi again.
Here is a log in non metrics. In 3.gear jerking. It is normaly from 2.000rpm. to 4.000 rpm the problem appears.