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Hello guys,
This problem is happening on my versa 2012 sv, when you start accelerating, of you do it slowly the car run smooth, but when you need a little bit more for example to merge the high speed traffic from a ramp this problem is worst, the acceleration is horrible and feels like ride a horse, too much jerks, I don't know how to explain this problem, so I made a video, on the videothe gas peddal was at 50% and 100% from 0 mph in both 50% and 100% the car feels very bad, I replaced the MAF sensor but nothing change, please see attached links below

https://youtu.be/6zZXH79d29I
https://youtu.be/VZNtTVPVlLU

Let me know, Thanks in advance
Best regards
 

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That's not a MAF sensor at all. For the sake of the limited resources on the earth, please don't go throwing parts at this thing - let's actually diagnose the problem.

That's a fuel pressure problem attached to a car with a CVT. If the car never hesitates to start, put your money on a clogged fuel filter - and good luck.

Lesser chance, but these cars have notoriously crappy fuel pressure regulators. Could be that.

You'd need a vacuum gauge and fuel pressure tester to figure it out. If you've got those I'll help you out more, but either way you're going to end up dropping the fuel tank from the car - it's a nightmare. I'd just give it to a shop.
 

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I could always be wrong but it doesn't happen very often. Why the first thing to do like always is to run for codes.

I just diagnosed another as CVT on another website and the dealer confirmed it, the video given there was identical. That's after another about a month ago.

Just cured another doing that by simply adding fluid to it, the hydro circuits were running out of fluid during the ramp up in car speed. The guy had removed the drain-to-level plug and then forgot to put it back in, the car moving about then threw enough fluid out to then be low on fluid even though the standpipe fixture was still in place.

CVT can slip/jerk in 500 different ways, there is no set rule in how it has to happen. The whine often complained about later in life is slip, the chain slipping say a tooth or so every revolution, the 'racheting' then makes the whine. New fluid sometimes makes it disappear. Or shortly after the true slipping begins. Take note the OP mentions jerking too, more likely CVT than fuel simply running out. The chain suddenly grabbing again jerks the car. A resumption of power due to fuel pressure coming back is not so abrupt. In this case the pulley could be sticking at a certain point and the stepper motor just keeps trying to push it past that point as it is commanded to do so. The pulley slide bearings stick first then seize up solid and how a lot of them tear up. The pulley load is around 800 psi.

If fuel pressure is enough to at least start and run then under load the engine typically misses then drops out all at once, I see none of that there. It'd pretty rare for fuel pressure to be so there then not there as to simply have the engine rear up and down perfectly clean in rpm, usually there is a falloff and the miss happens in that. Pushed harder the engine should die if it is fuel pressure, he did it repeat times there but no dying. Not impossible to be a pressure issue though, just unlikely to me.

Versa should have a hole under rear seat to change fuel pump from above, mine does ('11). Tank stays in place.
 

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Without the proper diagnostic tools, no codes, etc. This is all guess work. The fuel filter which is integrated into the FSU could be plugged, could be bad fuel, could be a CVT issue.
 

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Depends on the skills of the person local there. So many things are easy to figure out if you are right there and can do the quick weed out testing in person that can often be done. It's not that hard to pick out a CVT slip and grab from a low fuel pressure problem if you put the engine into different load possibilities to check out how it responds. Low fuel will not simply cut off 100%, at some point you will get it in the partial loaded state and then the misfire or backfire will tell you that is it. They never cut clean off 100% all the time like turning the key off.

The longer you mess with the car the more the problem sorts itself out to you if you are paying attention. And of course the code can point you as well. Often you won't get one though as code response had been greatly damped in later years to lower fake warranty claims, they cannot post one simply over one time a thing goes wrong. Rather the software is written to have a certain thing fail 3 or 10 or whatever times before it posts a code, the software engineers argue over that all day long.
 
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