engine jerking... b16a

[shah5755]

need some help here bro....my ride keeps on jerking mostly during low rpm around 1k-2500 rpm....if use low gear not so bad jerking but if u use the high gear xpesially 4th gear will feel more jerk...
when check spark plug, 1st and 3rd plug got black mark and a bit wet......after clean/change plug ok but only for 1-2 weeks (jerk again).....ask fren they said need to top overhaul.......is it

 

[arrowhead]

engine jerking could be caused by several things bro... i would firstly check my ecu/chip. try to replace with a friend/foremen and test.

if still got, check the following:
distributor
plug cables
injectors
spark plugs (but u said u have checked)

thats all i can remember for now.

cheers. keep us updated

good luck

 

[D-IV]

The plug is wet due to engine oil or due to fuel.. i'm sure you can tell the difference. If oil, then there's some leakage and if its fuel, then its overfuelling.

Don't tell me you floor the pedal at 1.5-2k rpm at 4th gear. Thats crazy hehehe.

 

[AD_EG]

bro it could be your plug seals have gone bad.

if its oil,then you might have problems with your seals

if its fuel,its either over fueling or then your spark has got issues,distributor got problems....

is your car stock? any VAFC? piggyback ? fuel regulator ? what is your car setup?

 

[shah5755]

my car still std b16a oni changed exhaust to straight flow.....from my view it seems like wet coz of fuel.....after clean plug no more jerking but after use for 1-2 weeks start again but not so serious....high speed ok no prob hehe

---------- Post added at 10:47 PM ---------- 6 hour anti-bump limit - Previous post was at 10:37 PM ----------

my car still std b16a,exhaust oni change to straight flow....seems like wet due to fuel bro,will try to send my car for proper inspection......btw its only jerk during low rpm,but when high rpm no jerk.....no vafc,piggyback etc hehe std mendet....

 

[AD_EG]

hmmm ok...then it might be a spark issue....check ur cables and your distributor....try to ask your mech to swap your distributor if he got an y spare lying around and see if it solves the issue....

 

[E-Tech]

Bro
Not everything is cause by ecu BUT
I have repair ecu that the customer
complained just like u... STD but have
over fueling....
So pls have a looking on ur ecu per my
posting on Ecu Warning....
Tq

 

[Gbun]

im facing the same prob here.... it happen bila2 dia suka. Last time i thought it was my gearbox. Yesss tukar the gearbox last year. It cost me 2k. But still the same prob happen. My foreman also pening kepala (maybe he's not very familiar with jazz auto). Then my wife notice something. The foreman use this oil that obviously stated "DO NOT USE ON AUTOMATIC TRANSMISSION". When i asked him, he said "ok... no problem punya. Boleh pakai..." So pros, what do u think? I dun want to tukar my gearbox again. Raya is coming... You know what i mean? hahaha thx in advance. :hmmmm:

 

[arrowhead]

well, describe ur jerking... it could be due to the above mentioned... gearbox wise, im not too sure...