Yet another grande cvt problem

[sarmadraheem]

AoA, i am facing this strange issue in my grande 2017 facelift since last 3 days:

1) car shudders for a brief window of 2 - 4 seconds with gearbox in D and rpms between 1k to 2k with speed around 30-40 kmph.
2) This shudder is very rare on straight plain roads.
3) After every left or right turn.specially u turn there always this shudder.
4) on climb, shudder is also felt 6 out of 10 times.
5) No shudder is felt in M mode any where in any situation.

No engine check light as well. Cvt was changed around 8k km back. Mileage now is around 69k km with periodic maintenance from toyota.dealership upto 60 k kms.

Need help and support for this haunting issue please.

Also, i got petrol from chaklala.scheme 3 shell pu.p near jan marriage hall. This all started a couple of km after refuelling.

[haseeb.basharat]

No engine check light as well. Cvt was changed around 8k km back. Mileage now is around 69k km with periodic maintenance from toyota.dealership upto 60 k kms.

Get its calibration done asap from toyota.
Calibration is required when there is a cvt oil change with a road test.

Put your car in D and then shift to R after 5 seconds, do you feel a jerk/shudder? If so then your inner cv joints are damaged, but Toyota would have noticed this and suggested you to change them at the oil change.

Normal shuddering is only felt on 40-60 when you lift foot and give light acceleration again.

on climb, shudder is also felt 6 out of 10 times

Check its spark plugs and catcon condition. Engine missing can also be mixed up with cvt jerks.

Also, i got petrol from chaklala.scheme 3 shell pu.p near jan marriage hall. This all started a couple of km after refuelling.

I feel like the fuel is of real bad quality. To kill the affect of bad fuel. Fill up with 20L of hi octane from any company operated site. Could it be a chocked fuel filter, did you change it before? Do this first then go for other things.

[sarmadraheem]

Thank you very much for a detailed reply. Will visit toyota for Calibration thing. For fuel pump, do i need to get it changed or is it serviceable?

Catalytic converter, i suppose is choked since there isnt anything i have done to it, in my memory.

[haseeb.basharat]

serviceable?

Catalytic converter, i suppose is choked since there isnt anything i have done to it, in my memory.

Get fuel filter changed, purchase new one from partscentral: https://www.facebook.com/PartsCentralPK/
For catalytic converter, use proficar catcon cleaner in fuel when you are going out of city.
Using it, and still got a healthy catcon at 150000kms mileage. Check spark plugs too

[sarmadraheem]

Great. Thanks a lot. Will report here after getting the things done

[sarmadraheem]

At toyota gt now.

Fuel tank had quite a lot of water in it. Fuel pump was also filled with water. Battery terminal was loose.

Jerk has now reduced considerably but is still felt at few turns.
Now waiting for some computer guy to.show up for another test.

[haseeb.basharat]

Now waiting for some computer guy to.show up for another test.

Bad fuel. Fill up only from company operated sites.
Fill at least 20L of hi octane next time.

[sarmadraheem]

Code scan was clear no error code or history at all. Put in 20 liters of high octane. Toyota Injector Cleaner and then filled the tank to the brim.