Car Jerks When Taking Off

[asanka424]

Hello experts,

My car is having a symptom of shaking/jerking when taking off from a stop. Sometimes it feels that car might be stalling. Any ideas or experience in this kind of problems? Apart from jerking thing car runs nicely. No misfires. I have changed my spark plugs and injectors have been cleaned. Air filter is also changed.

Can a clogged fuel filter cause this type of problem?

Please share your experiences and advices.

Thanks.

Asanka

[Schiffer]

i kinda have the same problem, specially when i take the foot off the break (auto),

i always thought its becouse the engine is a bit slow or something,

but mine aint jerking off much, just a bit slow and vibrates a bit.

[jdnet]

  On 7/3/2011 at 12:02 PM, Schiffer said:

but mine aint jerking off much, just a bit slow and vibrates a bit.

[Magnum]

check your air filter

[VVTi]

  On 7/3/2011 at 12:02 PM, Schiffer said:

,

but mine aint jerking off much, just a bit slow and vibrates a bit.

Do you get this all the time or only when you are in a tightly packed bus?

[heavyD]

  On 7/3/2011 at 1:20 PM, VVTi said:

Do you get this all the time or only when you are in a tightly packed bus?

Ahahahaha.... I knew it was only a matter of time the moment I saw the topic heading.

[asanka424]

  On 7/3/2011 at 12:19 PM, Magnum said:

check your air filter

Changed. But no improvement.

[asanka424]

  On 7/3/2011 at 12:02 PM, Schiffer said:

i kinda have the same problem, specially when i take the foot off the break (auto),

i always thought its becouse the engine is a bit slow or something,

but mine aint jerking off much, just a bit slow and vibrates a bit.

mine is a manual one. And yes engine shakes little bit when idling. Idle cannot set manually, it has a IAC.

[Magnum]

  On 7/3/2011 at 1:56 PM, asanka424 said:

Changed. But no improvement.

maybe its coz of the bad fuel

[asanka424]

  On 7/3/2011 at 1:59 PM, Magnum said:

maybe its coz of the bad fuel

no. It was there before this bad fuel thing came.

[nexus]

  On 7/3/2011 at 11:24 AM, asanka424 said:

Hello experts,

My car is having a symptom of shaking/jerking when taking off from a stop. Sometimes it feels that car might be stalling. Any ideas or experience in this kind of problems? Apart from jerking thing car runs nicely. No misfires. I have changed my spark plugs and injectors have been cleaned. Air filter is also changed.

Can a clogged fuel filter cause this type of problem?

Please share your experiences and advices.

Thanks.

Asanka

if these happen when ac is on or off?

[Schiffer]

  On 7/3/2011 at 12:18 PM, jdnet said:

oh **** that really looks bad

  On 7/3/2011 at 1:20 PM, VVTi said:

Do you get this all the time or only when you are in a tightly packed bus?

most of the time

god even im laughing reading my own comment now

[asanka424]

  On 7/3/2011 at 2:03 PM, nexus said:

if these happen when ac is on or off?

Actually I checked that. When AC is on engine vibrates more and when AC is off engine vibration is less. any way the jerk is still there when AC is off but it is in the manageable/comfortable level. I have a data scanner(cheap one from ebay) and I can check sensor data and ECM calculations. But everything seems normal.(at least for me).

one more thing. When car is idling I have AC compressor clutch engaging disengaging at about 20s intervals. I think this is normal since AC controller trying to keep the set temperature inside.

[Schiffer]

  On 7/3/2011 at 2:08 PM, asanka424 said:

Actually I checked that. When AC is on engine vibrates more and when AC is off engine vibration is less. any way the jerk is still there when AC is off but it is in the manageable/comfortable level. I have a data scanner(cheap one from ebay) and I can check sensor data and ECM calculations. But everything seems normal.(at least for me).

one more thing. When car is idling I have AC compressor clutch engaging disengaging at about 20s intervals. I think this is normal since AC controller trying to keep the set temperature inside.

may i know whats the car?

i kinda had the same problem with my old EE103, that actually came from a broken engine mount though

[asanka424]

  On 7/3/2011 at 2:22 PM, Schiffer said:

may i know whats the car?

i kinda had the same problem with my old EE103, that actually came from a broken engine mount though

It is hyundai Elantra 1.6 year 2000. Actually I had to change the engine mount (near gear box) I think it went bad due to this jerk or vibration.

[Sifaan]

  On 7/3/2011 at 2:08 PM, asanka424 said:

one more thing. When car is idling I have AC compressor clutch engaging disengaging at about 20s intervals. I think this is normal since AC controller trying to keep the set temperature inside.

that's not normal; climate control will turn the compressor on off as needed, but not so rapidly. so you should get it checked out.

Edited July 3, 2011 by Sifaan

[nexus]

  On 7/3/2011 at 2:08 PM, asanka424 said:

Actually I checked that. When AC is on engine vibrates more and when AC is off engine vibration is less. any way the jerk is still there when AC is off but it is in the manageable/comfortable level. I have a data scanner(cheap one from ebay) and I can check sensor data and ECM calculations. But everything seems normal.(at least for me).

one more thing. When car is idling I have AC compressor clutch engaging disengaging at about 20s intervals. I think this is normal since AC controller trying to keep the set temperature inside.

when ac is on car idles ok or it vibrate and rpm drop below 450?

Edited July 3, 2011 by nexus

[Schiffer]

  On 7/3/2011 at 2:24 PM, asanka424 said:

It is hyundai Elantra 1.6 year 2000. Actually I had to change the engine mount (near gear box) I think it went bad due to this jerk or vibration.

hmmmm i guess you need to speed up the engine a bit then (from a proper machanic)

and plz stop using the work jerking

[asanka424]

  On 7/3/2011 at 2:37 PM, Schiffer said:

hmmmm i guess you need to speed up the engine a bit then (from a proper machanic)

and plz stop using the work jerking

changing the idle is not an option since its set by ecu with IAC valve. Okay I will stop using that word.

[asanka424]

  On 7/3/2011 at 2:27 PM, nexus said:

when ac is on car idles ok or it vibrate and rpm drop below 450?

No No, Engine RPM stays about 750/850. It is the vibration that changing.

[asanka424]

  On 7/3/2011 at 2:27 PM, Sifaan said:

that's not normal; climate control will turn the compressor on off as needed, but not so rapidly. so you should get it checked out.

hmm. well AC is working. So this means low gas or high gas?

[serialkiller]

mates.

I got the same problem since last Thursday.

Mechanic says , it's becos of the bad fuel. and he did some cleaning on fuel system.

and asked me to fill up the petrol with 95 octain.

when did this hapens I got 3/4 tank with 90 octain.

and for the issue, it's still have but not like earlier. it's happens only on idle.( some time engine shut down )

and now i am wondering about engine mount issue. I mean as i remember I think I got bad mount near gear box.

Any thoughts?

Thanks.

[TheClutch]

im also feeling some jerks and shaking while idle and take off...may be the bad fuel..and i pumped xtra premium at ioc and feel less shakings donno whether its correct..hoping to see my mech if it is going to continue

[CyRaX]

  On 7/3/2011 at 12:02 PM, Schiffer said:

i kinda have the same problem, specially when i take the foot off the break (auto),

i always thought its becouse the engine is a bit slow or something,

but mine aint jerking off much, just a bit slow and vibrates a bit.

lol

[nexus]

  On 7/3/2011 at 2:47 PM, asanka424 said:

No No, Engine RPM stays about 750/850. It is the vibration that changing.

i thinks it has some thing to do with your mounts check both engine and gear mounts and do you change your petrol filter recently?.

[Schiffer]

  On 7/3/2011 at 4:53 PM, CyRaX said:

lol