Engine shuddering and jerking

[Myxilplix]

Got check your engine oil level? Is it low? Make sure the engine has been off for at least 3-4hrs before checking your dipstick.

 

Umm bro, oil level should be checked when warm unless otherwise stated. I haven't come across a car where the oil should be checked cold.

 

As for TS, basic diagnosis starts with spark and fuel.

Edited February 5, 2013 by Myxilplix

[Gee]

I would Check spark plugs, ignition system first.

Could be misfiring.

[Watwheels]

Umm bro, oil level should be checked when warm unless otherwise stated. I haven't come across a car where the oil should be checked cold.

 

As for TS, basic diagnosis starts with spark and fuel.

Dunno what you are talking.

 

In order to have an accurate oil level reading you have to wait for the oil to settle.

Edited February 5, 2013 by Watwheels

[Robinyip]

thanks googled around seems to be coil problem..

 

just changed one 2 months back now got to change another one..

 

any good workshop to recommend?

 

went to one last week and tell me cannot diagnose.

[5936]

Air + Ignition + Fuel

Check these, starting by testing without air filter, clean airfilter

Clean airmass sensor with electronic contact cleaner spray.

Next spark plugs,check gaping, worn out signs.

Lastly, spray carburetor/injector cleaner at throttle body.

Beyond these, i will refer to workshop.

Edited February 5, 2013 by 5936

[Watwheels]

thanks googled around seems to be coil problem..

 

just changed one 2 months back now got to change another one..

 

any good workshop to recommend?

 

went to one last week and tell me cannot diagnose.

You might as well change all the four. Changing one by one a bit tedious. How your mechanic know which one to change?

[Robinyip]

You might as well change all the four. Changing one by one a bit tedious. How your mechanic know which one to change?

 

my car only got 2 ignition coil.

 

got one look old and one quite new then when he took the old one out, sparks flying all over the place.

 

after done, all is good for a few weeks.

 

now problem back again.

[Ididbobe]

Bro I had the same problem as you. Car was very jerky 1500rpm and below....change this, change that still problem persisted.....finally my friend told me it's because of my lightened flywheel. Apparently it's a feature when you use that. So i prolly haveto live with it if i want to use the lightened f lywheel. May or may not help you but I guess best to cover all possibilities.

[Hamburger]

Umm bro, oil level should be checked when warm unless otherwise stated. I haven't come across a car where the oil should be checked cold.

this is what I call any how bomb....

[Caravan]

Dunno what you are talking.

 

In order to have an accurate oil level reading you have to wait for the oil to settle.

 

2nd that. In fact this is the first time I heard anyone say it should be checked warm.

[QQDreamer]

how about fuel filter? it could be this problem also?

[Bigbadguy]

Check the following

 

Spark plug

fuel filter

fuel pump

engine mount

maf sensor

choked exhaust

air filter

throttle body

 

 

[Myxilplix]

2nd that. In fact this is the first time I heard anyone say it should be checked warm.

 

Ok my bad. I'm from the "warm up and let drain into the sump before checking" school.

[Yahgo22]

 

 

yr engine air leaking. u can feel car vibrating and car no power.

 

same time it consume lots of petrol.

 

pm me if u need help. i just repair mine. damage $180. one day job

 

 

[Pisces69]

thanks, but the shudder is not constant.

 

Off and on..especially when i just move off, after i drive for 10 mins, everything is fine.

 

come and go..i went goggling and it might be misfiring?

 

any recommendation workshops to diagnose this?

 

 

I suspect yr spark plugs not sparking properly.

 

Chk all electrical connections especially ignition wires n electronic coils..spark plugs correct heat range..ground wires..etc..

 

Especially yr plugs. Wrong heat range can cause this either carbon build up if too cold or too hot is pre-ignition.

Also plug wires fr poor connection or coil faulty.

 

Cud also b ignition timing wrong setting.

 

U need to hv an experienced mech to trouble shoot one by one.

 

One more thing cud b auto choke not working n fuel/air mix too lean when engine is cold.

Edited February 6, 2013 by Pisces69

[Tohto]

Spark plug, ignition coil or spark plug cable..

[Tomsss]

I would check the throttle body. Dirty or clogged throttle body can cause rough idling, if not it's the potentiometer inside that is acting up. You mentioned that it usually happens during idling and when moving off, so yeah that's my opinion.

[Pisces69]

Bro I had the same problem as you. Car was very jerky 1500rpm and below....change this, change that still problem persisted.....finally my friend told me it's because of my lightened flywheel. Apparently it's a feature when you use that. So i prolly haveto live with it if i want to use the lightened f lywheel. May or may not help you but I guess best to cover all possibilities.

 

 

Lightened flywheel u wil hv rough n irregular ideling only. Can hear idle up n down at traffic light.

 

Last time my car must off engine if tp beside me at red light otherwise sure kenna inspection at tp hq.