Author Topic: Jerky feeling when moving off from stationary or slow speed  (Read 15734 times)

Offline Midnight

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Jerky feeling when moving off from stationary or slow speed
« on: January 06, 2009, 10:28:09 PM »
Dear all,

I did a search on this topic and found a related thread but last posted is in August 2007. So i have decided to start a new one. Hopefully can have a more focused discussion on this and also beneficial to new Latio owners.

Personally i drive a Dec 2006 Latio. From yesterday, the traffic is really really heavy (probably sch starts) especially on the expressway and i find myself in a start-stop-start-stop situation for almost 80% of my journey home (fyi i take PIE).

The problem: It is not long before i realised that the car is very jerky when moving off or when car is at slow speed. I am generally easy on the accelerator and do not have the habit of stepping harder in order to accelerator faster.

Does any bros here experience the same and how to resolve this problem? It was brought up in an old thread that TCM changed the fuel pump and problem solved. I am pondering now whether is it the 'style' of a CVT gearbox or has it to do with my driving style, or seriously some parts need replacement?

CVT has infinite gear and suppose to give smooth acceleration. I am more inclined that the jerkiness is not normal. Can anyone share yr experience and information here?

Thanks!


Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #1 on: January 07, 2009, 08:59:50 PM »
No comments at all?  :(

Only my Latio has such problem?

Today to avoid the PIE jam, i use ECP instead, then kanna accident lane 1. Got to bear with the jerkiness again.

Can anyone give some advise?

Offline Garf83

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #2 on: January 07, 2009, 09:20:30 PM »
erm... i've not experienced this jerkiness u mentioned.  I've had my own experience with PIE's morning & evening jams but i didnt get the jerk.  You may want to ask TC to check on ur next service?

**did u step and hold the accelerator? or u step, release, step, release?
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Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #3 on: January 07, 2009, 09:41:17 PM »
erm... i've not experienced this jerkiness u mentioned.  I've had my own experience with PIE's morning & evening jams but i didnt get the jerk.  You may want to ask TC to check on ur next service?

**did u step and hold the accelerator? or u step, release, step, release?

My next servicing is like 7000km away  :( I have make appointment at TC BT for this problem, already... just worried that the service advisor will say "it is normal, CVT is like that one..."

Few scenarios:

1. Accelerate normally, RPM not exceed 2k. I feel that the gear "Judder" (like wiper not smooth like that) while i am accelerating, once above ~50 or 60km/h, it is gone. If i step harder and exceed RPM 2k, the judder feeling is less.

2. Traffic jam situation when my speed cannot go beyond 30km/h kind. Start-Stop-Start-Stop  like that. Confirm can feel jerkiness, not smooth at all. And i cannot rev above 2k because the car will surge so much forward (during a traffic jam)!

3. My journey home is so frustrating that when i reach my MSCP, i rev above 2k in an attempt to avoid the jerkiness but have to release the accelerator very soon because the turn is just round the corner. This is when the car jerk violently. It is like you drop gear suddenly in a manual car and the engine break kicks in. But this is worse coz the car really jerks. I know this is not normal coz i have been driving for 10 years, manual car, 4AT also tried before. Never experience anything like this before.

Pardon my grumbling... I have make appointment to go TC workshop 2 saturdays from now. If anyone till has any experience on this, do share, so that i know how to bring my problem across to the service advisor correctly and most important, efficiently.

Thanks!






Offline SoL

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #4 on: January 07, 2009, 09:55:42 PM »
Sometimes after slowing down for a turn, when I make the turn and step on the accelerator, I feel a slight jerk. But this is only when I step quite a lot. I always thought this is normal, like you suddenly inject alot of fuel into the engine!

Maybe you gentle a bit? Step gently and increase the pressure after that. Not sure if it helps!

Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #5 on: January 07, 2009, 10:11:21 PM »
Sometimes after slowing down for a turn, when I make the turn and step on the accelerator, I feel a slight jerk. But this is only when I step quite a lot. I always thought this is normal, like you suddenly inject alot of fuel into the engine!

Maybe you gentle a bit? Step gently and increase the pressure after that. Not sure if it helps!

Stepping gently helps definitely. Just that when i am driving a 4AT and i also accelerate in such aggressive manner, i did not experience anything like this, that i feel is out of the norm behaviour of  a gearbox.  :confused1:

Offline NA

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #6 on: January 07, 2009, 10:23:18 PM »
Maybe the throttle cable or fuel chamber chokage as I had similar problem and TC did the cleaning to my throttle cable and fuel chamber. For the past 6 months, I do not have the problem again.

Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #7 on: January 07, 2009, 10:27:45 PM »
Maybe the throttle cable or fuel chamber chokage as I had similar problem and TC did the cleaning to my throttle cable and fuel chamber. For the past 6 months, I do not have the problem again.

Which branch did u go to? Do you remember the advisor name who attended to you?

Thanks  :smile:

Offline zzyzx

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #8 on: January 07, 2009, 10:44:26 PM »
whatever it is, i hope it's not the gearbox acting up. i drove a CVT lancer before i got my 4AT latio. CVT is just not reliable to me. but the nissan's should be more robust than the mitsubishi's (i think).


Offline NA

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #9 on: January 07, 2009, 10:55:00 PM »
Which branch did u go to? Do you remember the advisor name who attended to you?

Thanks  :smile:

I went to jurong branch, advisor i forget his name. He is chinese guy think about 30+.

Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #10 on: January 07, 2009, 11:02:00 PM »
whatever it is, i hope it's not the gearbox acting up. i drove a CVT lancer before i got my 4AT latio. CVT is just not reliable to me. but the nissan's should be more robust than the mitsubishi's (i think).



Gearbox acting up? This is the last thing i want it to happen. But if it has to happen, better happen now because still got 1 year warranty left. Sigh...

Can't help wondering where has the reliability of Jap car gone to. My previous Korean make whack until jialat jialat stil surviving no problem. Latio only 2 years old so many problems. Got it only 3 weeks ago (2nd hand) and found so many problems including the well-known steering coupling problem.


Offline zzyzx

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #11 on: January 07, 2009, 11:13:24 PM »
actually korean made cars (or maybe some only?) are actually built better than some jap cars in some way.

i was so surprised to see my friends's kia cerato has got the hard foam thing in between the front bumper and the metal beam to minimise damage during front collision while my previous lancer doesn't has it. my lancer's metal seems to be weaker also.

i'm glad that the latio has got what i expected. metal also harder. cos i notice the rest of the older latios in my mscp dont have dent cause by other ppl opening their doors. haha...


Offline Garf83

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #12 on: January 07, 2009, 11:25:51 PM »
Gearbox acting up? This is the last thing i want it to happen. But if it has to happen, better happen now because still got 1 year warranty left. Sigh...

Can't help wondering where has the reliability of Jap car gone to. My previous Korean make whack until jialat jialat stil surviving no problem. Latio only 2 years old so many problems. Got it only 3 weeks ago (2nd hand) and found so many problems including the well-known steering coupling problem.

mmm... hard to comment on the reliability since its a 2nd hand car, cos we never know what the 1st driver did to the car.  Anyway, keep complaining to TC abt the problems faced by ur Latio, TC will act upon it - just persist abit...  :D
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Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #13 on: January 07, 2009, 11:32:11 PM »
actually korean made cars (or maybe some only?) are actually built better than some jap cars in some way.

i was so surprised to see my friends's kia cerato has got the hard foam thing in between the front bumper and the metal beam to minimise damage during front collision while my previous lancer doesn't has it. my lancer's metal seems to be weaker also.

i'm glad that the latio has got what i expected. metal also harder. cos i notice the rest of the older latios in my mscp dont have dent cause by other ppl opening their doors. haha...



I notice that the metal for Latio could be harder also because the door closes with a firm thud. But sound proofing is very terrible. On rainy days, especially heavy rains, the tits and tats from the roof... if you know what i mean....  worse than my previous Getz!


Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #14 on: January 07, 2009, 11:37:24 PM »
mmm... hard to comment on the reliability since its a 2nd hand car, cos we never know what the 1st driver did to the car.  Anyway, keep complaining to TC abt the problems faced by ur Latio, TC will act upon it - just persist abit...  :D

Ok, trying not to drift away from the intended topic...

I will definitely persist, cos i am not going to live with this jerkiness for another 3, 4 years.... hopefully can be resolved.

I will continue to update when i have new findings on this problem. Anyone who has any info to share pertaining to this problem, continue to contribute.

 :smile:

Offline Ying

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #15 on: January 07, 2009, 11:49:27 PM »
Gearbox acting up? This is the last thing i want it to happen. But if it has to happen, better happen now because still got 1 year warranty left. Sigh...

Can't help wondering where has the reliability of Jap car gone to. My previous Korean make whack until jialat jialat stil surviving no problem. Latio only 2 years old so many problems. Got it only 3 weeks ago (2nd hand) and found so many problems including the well-known steering coupling problem.



got the car 3 weeks ago but 7k km till next servicing. So you did not send to TCM for checking/servicing right after you got your car?

don't worry. some major parts have longer than 3 years waranty. They just order one steering coupling for me as it is still under warranty even my car is coming to 4 yrs old. Let TCM check your car, dont try outside workshop first coz got problem they also ask you to go back TCM. If the car had accident before then you got it then you should look for the 2nd hand car dealer soon.  

Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #16 on: January 08, 2009, 10:15:23 PM »
got the car 3 weeks ago but 7k km till next servicing. So you did not send to TCM for checking/servicing right after you got your car?

don't worry. some major parts have longer than 3 years waranty. They just order one steering coupling for me as it is still under warranty even my car is coming to 4 yrs old. Let TCM check your car, dont try outside workshop first coz got problem they also ask you to go back TCM. If the car had accident before then you got it then you should look for the 2nd hand car dealer soon. 

Before i bought it at mileage 41,000km, i checked with TCM that the last servicing is 38,000k and it is a major servicing (package C). SO i did not send the car in for servicing right after i got the car.

And this is something new. I thought after 3 years warranty is over, it implies that all parts warranty is over. The steering coupling is a known problem to many, considered as a design flaw that is why TCM is willing to change for you FOC. But in anyway, it is a good news that they willing to change for you even know yr car has passed 3 years!


Offline Ying

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #17 on: January 09, 2009, 12:46:58 PM »
It is hassle free with NPMP.

btw, spark plug is good for 100k right? so we should get replacement if faulty after 4 years but still under 100k right? So can't say after 3 years, all parts not under warranty.

Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #18 on: January 09, 2009, 10:42:40 PM »
It is hassle free with NPMP.

btw, spark plug is good for 100k right? so we should get replacement if faulty after 4 years but still under 100k right? So can't say after 3 years, all parts not under warranty.

I dunno if spark pluf is good for 100k. But if the stock spark plug can last 100k, then it is even better than a Denso Iridum i think. But i hope you are right. My take is if u had gone to TCM for servicing more often, you have better bargaining / negotiating power when you need them to change this and check that....


Offline Midnight

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Re: Jerky feeling when moving off from stationary or slow speed
« Reply #19 on: January 17, 2009, 01:37:52 PM »
Dear all,

Just a short update. I went down to TCM@BT today at 12pm which is my appointment time. The advisor who attended to me says that usually Sat is more for servicing and attending to faults which are straightforward. Faults which needs diagnosis and test drives has to be on weekdays. And he blames it on the telephone operator who book the appointment for me.

Today is a total waste of time because he asked a technician to testdrive with me,  suppose to identify the faults so that i can bring the car in on a weekday morning for rectification work. But the technician is totally uninterested. And he still needs me to remind him that Latio Sports and Lation Premium sedan has the same CVT gearbox. I said the behaviour of the gearbox should be the same for both Sports & Premium sedan. He told me that it is different, because sports is for different function and CVT gearbox is like that one.

Is TCM customer service so lousy?  :glare:
I have to send in the car again on a weekday and do the testdrive and everything again.
 :(