First, take your car to another mechanic. Then, check in this order again for counterfeit parts (if they've already been replaced) and replace with better parts or for dirt or faulty parts:

Sparks, ignition coils and wires, oil filter, fuel injectors, oxygen sensors, fuel pump strainer, fuel pump.

Those I'm almost certain it's a combination of the first three. And remember...

Thank you guys.
I am back to the first mechanic I knew in this town who also feels it has nothing to do with the gear box. He scheduled a live scan with his friend and auto electrician. By the way, we have checked fuel pump, filters, oxygen sensors and catalytic converters. I imagine, this might just be something tiny lying somewhere and laughing.
I will update the house. I hope we are able to solve this problem some time soon.

tunene:
Thank you guys.
I am back to the first mechanic I knew in this town who also feels it has nothing to do with the gear box. He scheduled a live scan with his friend and auto electrician. By the way, we have checked fuel pump, filters, oxygen sensors and catalytic converters. I imagine, this might just be something tiny lying somewhere and laughing.
I will update the house. I hope we are able to solve this problem some time soon.

Probably your engine not receiving right amount of fuel for acceleration. Examine all spark plugs to see if all are firing.

Besto:


Probably your engine not receiving right amount of fuel for acceleration. Examine all spark plugs to see if all are firing.

A lot of of us have said this but he is not going back to check again. Chikena

So guys, when I said first mechanic. I meant the first mechanic I met in this town.
We are looking at the whole combustion system again. Starting eith easy things like spark plug, and several other things.
The biggest gain has come from
Servicing the injectors, replace spark plugs and chain of accelerator pedal cos the pedal too was ceasing.

However, not yet Uhuru. However, jerking has reduced. I will come back and report progress.

Meanwhile, check engine light is off for about 2 weeks now and not coming on again. I lost my old codes, so no codes to check.

Thank you for all the contribution.