Nissan Moco Strange Issue

[pwuser148738255231]

I have a Nissan Moco 2015, import 2017. It was owned by us since it was imported so we are kind of the first owners. It came 7000 km driven and right now it is at 127k.
First of all, I am not well aware about cars and I only started going for its maintenance since my father's amputation last year. 1st December, I changed its gear oil as sometimes it would do sudden jerks on AC and a mechanic (a friend's known) suggested CVT gear oil that I got from Karachi. I would usually take my friend's help but he has passed away. It's spark plugs were changed at the time but with Chinese ones.
About a month ago, the car itself turned off on D in Eco IDLE but didn't turn back on and then its check engine light came on which was an error for its catalytic converter. The converter got cleaned and so did the fuel and I added a catalytic converter cleaner in my car.
After a few days, it started jerking. These are slow jerks while accelerating and then at a constant speed of 60/80 it would do these jerks like it's trying to push itself but something is blocking it.
I have gone to 4 mechanics since then, its spark plugs were replaced as two days back as it gave blinking check engine light while doing the same jerks but the problem was swear. Tapad work was done as well 2 weeks back as the car was turning off on D and R and vibrating. Its coils have been checked, fuel injector, fuel pump, catalytic converter. Last night its oxygen sensor was changed too. There are no DTCs but the jerking doesn't go away. Sometimes it's evident, other times its not so noticeable.
The only two things left to try is to accelerate the car for 100 kms or so as one mechanic suggested it has air in its transmission and another friend suggested that it's time to replace its assembly.
Can anyone of you guys help me as to what could be the cause? I am very distressed. The car has only been driven by me and my father.

[affanhaq94]

What kind of fuel are you using? Have they checked the fuel filter? If this has an in tank 'sock' it may need to be pulled and cleaned out if there's a blockage. Something worth checking.

What kind of CVT fluid was used? Does it meet the spec for this car?

Someone said in another thread that this car has 2 filters in the trans and most mechanics only clean out one. May be worth checking/looking into. Also, recheck that the cat is actually 'clean'.

Good luck with repairs!

[affanhaq94]

Nissan moco 2015 jerking

My Nissan Moco 2015(suzuki MR Wagon) Jerks during drive... Yeh jhatkey aisey hotey jaisey gear shift kr k wapis ho jata... Iski average b 21km sey 16.4km pey aa gaeyy... Gari awaz deti jaisey koi isko accelerator chhorr chhorr k deta ho... Plugs changed Gear oil changed fuel pump completele replaced coils double checked sb working okey... Ab kuch mechanic bol rahey gearboz replace krwa do... Main gearbox tabdeel krwaey baghair iss issue ko solve krnwana chahta hon i mean kuch parts badal kr if t…

Check this thread.

Someone has also posted a link in there for a CVT fluid change.

[pwuser148738255231]

Yes, He literally said that.

I use Total F-6 in Islamabad for fueling. I am not sure about fuel filter being checked. I can check that too.

Yes, CVT oil was specific for this car. Verified all of that myself.

CAT Is clean that is certain. 2 filters, interesting. Wonder if my mechanic knows.

Any recommendation for mechanics in Islamabad/Pindi for Japanese cars?

Also, do you think Denso Iridium plugs should be installed?

[affanhaq94]

Sorry I can't recommend as I'm new to Pak, been here about a year now only in Lahore. I have seen a member here, username danikk I think. Seems to be very knowledgeable here in your area.

Denso's are good. Oe supplier for some vehicle brands as well. I have a Suzuki every 2015 model turbo, I believe same engine as your mocco R06A.

I used NGK plugs (genuine Suzuki) that I found cheap on daraz. You just have to ensure the plugs are not fakes and you have the correct part #.

The only guesses I have, as I am no expert mechanic, is that there's a lingering misfire somewhere, or your trans is on its way out. I would recommend finding an expert in your area rather than have local ustaads try to guess and replace a bunch of parts.

[affanhaq94]

Also, have you checked your air filter?

If you have a scan tool, you can check things like misfire count, maf operation etc. A scan tool and a professional who can deduce what's going on with that information properly will help to pinpoint the problem.

There's lots of little things to inspect though. Had a friend with a civic, same kind of issue. It had a slit in the air intake hose causing it to jerk and hesitate while accelerating. No codes for that one.

[pwuser148738255231]

Yes the air filter is checked. I do have the scanner, it does tell alot of things but as I said, due to my insufficient knowledge about cars, I am not sure what's going on.

[affanhaq94]

Well, the only thing I could suggest, is if your scanner has live data stream, to select everything and videotape the scanner while you're on a drive.

Post up the results here and someone more experienced may chime in to help.