Honda jazz jerkinh while low rpm @gear 3 manual gear

[Bluepiggies]

Hi experts,

 

Pls advise me.

 

Im driving a manual 06 jazz, renew coe.

When my car @gear 3 especially, low rpm, between 2 to 2.5,

It jerks and shake. Once it hit, 2.5,its normal.

 

Petrol : shell 95 = very bad jerk almost every time

Shell 98 = not so bad. Jerk not so hard.

Shell Vpower = much lesser, light jerk.

 

All filter changed. Engine mounting also change ( based on recommandation ) workshop advise change 8 sparkplug.

 

I feel if is spark plug, what petrol also should jerk.

 

Please advise me

[Watwheels]

Maybe fuel pump faulty.

[Bluepiggies]

Maybe fuel pump faulty.

Just wondering if fuel pump .. it should be constant jerk no matter what fuel i use ?

[Watwheels]

Just wondering if fuel pump .. it should be constant jerk no matter what fuel i use ?

 

If not fuel pump there are others. There are quite a number of causes when it comes to jerking.

 

Mass Airflow Sensor faulty usually is the common cause of jerking but since you didn't mention any CEL or error code, it's most likely not the sensor but I can't rule out that the sensor is dirty. That can also be a factor. If it's dirty it gives the computer the wrong reading and it will screw up the air/fuel mixture and cause the car to jerk.

 

Since yours is a renewed COE car if me I would replace the air sensors namely MAS sensor and the exhaust lambda sensor( it's also an air sensor, they form a loop). Although they are electronic components they do wear and tear over time.

[Trex101]

Hi experts,

 

Pls advise me.

 

Im driving a manual 06 jazz, renew coe.

When my car @gear 3 especially, low rpm, between 2 to 2.5,

It jerks and shake. Once it hit, 2.5,its normal.

 

Petrol : shell 95 = very bad jerk almost every time

Shell 98 = not so bad. Jerk not so hard.

Shell Vpower = much lesser, light jerk.

 

All filter changed. Engine mounting also change ( based on recommandation ) workshop advise change 8 sparkplug.

 

I feel if is spark plug, what petrol also should jerk.

 

Please advise me

 

High chance

 

1 - Fuel pump & fuel filter

2 - Ignition coil or spark plugs

 

or could be carbon build up in combustion chamber since you say using high octane fuel will lesser the jerk. Use a high strength PEA base injector cleaner and use 95 fuel to test. If it get's better than you know it's carbon build up.

[Keithchue]

if it only gear 3, then it is mystery, I would look into the coils for the fit, got a friend whose FIT was jerking at speed also jerk, diagnose as misfire. car is fine after ignition coil change and new plugs.  he is driving the first fit with 8 ignition coils one.

[Bluepiggies]

if it only gear 3, then it is mystery, I would look into the coils for the fit, got a friend whose FIT was jerking at speed also jerk, diagnose as misfire. car is fine after ignition coil change and new plugs. he is driving the first fit with 8 ignition coils one.

It happened mostly at gear 3 .. gear 4 n 5 does happen but seldom. I will look to change ignition coil n plug.

 

Good advise sir.

 

Mine is also 8 coil one ....

High chance

 

1 - Fuel pump & fuel filter

2 - Ignition coil or spark plugs

 

or could be carbon build up in combustion chamber since you say using high octane fuel will lesser the jerk. Use a high strength PEA base injector cleaner and use 95 fuel to test. If it get's better than you know it's carbon build up.

How abd where can i find the pea injector ?

High chance

 

1 - Fuel pump & fuel filter

2 - Ignition coil or spark plugs

 

or could be carbon build up in combustion chamber since you say using high octane fuel will lesser the jerk. Use a high strength PEA base injector cleaner and use 95 fuel to test. If it get's better than you know it's carbon build up.

How abd where can i find the pea injector ?

High chance

 

1 - Fuel pump & fuel filter

2 - Ignition coil or spark plugs

 

or could be carbon build up in combustion chamber since you say using high octane fuel will lesser the jerk. Use a high strength PEA base injector cleaner and use 95 fuel to test. If it get's better than you know it's carbon build up.

How abd where can i find the pea injector ?

[ianz]

testing, thanks

[Trex101]

It happened mostly at gear 3 .. gear 4 n 5 does happen but seldom. I will look to change ignition coil n plug.

 

Good advise sir.

 

Mine is also 8 coil one ....

How abd where can i find the pea injector ?

How abd where can i find the pea injector ?

How abd where can i find the pea injector ?