Jerking before acceleration

[Abdulazeez]

Hi I'm new to this forum and this is my first car. My Toyota Yaris 2008 jerks each time before acceleration. I bought the car six months now, and I wasn't driving it much for like four months. And after the MOT and  full service in August 2021, I discovered the jerky nature as then I started paying more attention. Does anyone have this problem and how was it resolved? Thanks 

[Heidfirst]

Hi, welcome to TOC.

Some more information would help others to help you - let's start with what engine & transmission?

[Cyker]

Do you mean like there is a hesitation/lag before it accelerates, or when you press the accelerator the car kangaroos, like you sometimes see learners who're just being taught clutch control do?

[Abdulazeez]

It jerks or stutters as if I'm changing gear. As if it's sensitive and shakes the car a bit, but only on the first press on the gas.

[Abdulazeez]

It is MMT transmission 1.3 petrol.  2008 model

[Abdulazeez]

And like other automatic, is my Yaris supposed to creep when I switch on the engine, before pressing the gas?

[flash22]

The mmt gearboxes don't creep either the clutch is worn or there is an issue with the clutch actuator, sometimes you can get away with a slight adjustment

It's a known issue

CP-0022T-0411-EN.pdf

[Cyker]

Don't they??? I swear they do...! As in if you have it in drive and let go of the brake, the car does start moving on idle doesn't it??

 

[Abdulazeez]

Not Drive but E in Yaris. Thanks everyone for your response. I would appreciate further information. 

[AisinW]

You can do cleaning throttle body gently. But I guess it is MMT issues, you can just drive it and visit mechanics who are familiar with MMT.  Toyota abandoned  MMT in Yaris and larger cars and prefer CVT or 8 speed torque converter that needs no regular repair.  Only fluid every 60k miles

[Abdulazeez]

Thanks for the reply