Engine jerking when coming to a stop - what's the problem?

[Apache91120]

Experiencing this problem lately. Sent to Proton SC to check but they say "everything is OK" but the problem still exist. What could it be?

 

[vr2turbo]

What car and how old is it?

 

[Apache91120]

Proton Persona 1.6 Auto. Year 2008

 

[Izso]

Describe the problem in detail like how you replicate the problem and stuff. For all you know you might have warped brake discs. How is the jerking? Describe a bit more or take a video.

 

[Apache91120]

It will happen once or twice a day. If it is brake problem then it might occurs every time I stop but it should be checked too. It feels like the engine is going to die off but so far it didn't perhaps because I will change the gear to Neutral.

 

[DanzEterna]

perhaps could be your air flow controller

 

[Apache91120]

Yes! I think that's the culprit. It's called "Purge control valve" and the "Canister assy" but the service center could not find any fault because perhaps they didn't check or they just don't know

 

[vr2turbo]

It will happen once or twice a day. If it is brake problem then it might occurs every time I stop but it should be checked too. It feels like the engine is going to die off but so far it didn't perhaps because I will change the gear to Neutral.

Since you mention putting in neutral is okay, probably your idle speed is too low, so when in gear the engine is vibrating in low idle....

 

[Izso]

Or it could be a clogged TB?

 

[Apache91120]

Since you mention putting in neutral is okay, probably your idle speed is too low, so when in gear the engine is vibrating in low idle....

Idle speed is correct, same as before the problem started.

 

[vr2turbo]

Idle speed is correct, same as before the problem started.

Then we probably need a more detailed description of the jerking as mentioned by bro. Izso.....

 

[Apache91120]

I have been recommended to a workshop in Taman Petaling Utama, P.J. Called the owner yesterday and he said to bring the car for checking.

---------- Post added at 09:59 AM ---------- 6 hour anti-bump limit - Previous post was at 09:57 AM ----------

Or it could be a clogged TB?

What is this & where is this thing located?

 

[vr2turbo]

I have been recommended to a workshop in Taman Petaling Utama, P.J. Called the owner yesterday and he said to bring the car for checking.

---------- Post added at 09:59 AM ---------- 6 hour anti-bump limit - Previous post was at 09:57 AM ----------



What is this & where is this thing located?

TB aka Throttle Body, attached onto inlet manifold leading to air filter

 

[Apache91120]

I see

 

[stupidcar]

Give it up. Its normal. It feels like choking then it jerks.
But actually, yeah, it is normal. Mine 2012 Persona Auto as well.
Air cond compressor kicked in is worse.