Small jerking

[jebatdex]

Guys

I can feel small jerking while slow acceleration of my car. While cruising, OK. What I know jerking is caused by:

1) spark plug cable (relatively new 1 month)
2) fuel filter (about 6 months old)
3) distributor (change new one 3 years ago)
4) spark plugs, air filter (all new, just serviced my car)

What else should I consider? I am thinking about the fuel pump (inside the fuel tank). This is since it never get changed, still using original one, the car already 18 years. Should i change it anyway?

Thanks in advance.

 

[Izso]

What car?
Auto? Manual?

 

[ken yeang]

carb or EFI?

 

[jebatdex]

1996 1.6L Satria 4G91, stock.. Manual

 

[Kopi]

4g91? distributor?

carburettor 4g91?

 

[jebatdex]

Oh sorry.. Or is it 4g92? Confused already. It is 1.6 sohc. But for sure not using carburator

 

[Izso]

Can you describe the jerking a bit more? After you clutch in? Or clutch off? Or during accelerating? Or what?

 

[jebatdex]

Can you describe the jerking a bit more? After you clutch in? Or clutch off? Or during accelerating? Or what?

Clutch in, during slow acceleration, not pressing the acceleration pedal very hard. Like normal driving, when I want to accelerate a bit, feel like 'semput', but very little tiny semput2 especially in middle gear (gear 2 & 3, like not enough air/fuel). Feels similar to when you drive your car, after you start the engine in the morning and straight away drive it, not warming up.

That is the best I can describe huhu it is not normal, I know there is something wrong because it does not feel like that before.

 

[DanzEterna]

your fuel lines could be clogged.

 

[Izso]

Clutch in, during slow acceleration, not pressing the acceleration pedal very hard. Like normal driving, when I want to accelerate a bit, feel like 'semput', but very little tiny semput2 especially in middle gear (gear 2 & 3, like not enough air/fuel). Feels similar to when you drive your car, after you start the engine in the morning and straight away drive it, not warming up.

That is the best I can describe huhu it is not normal, I know there is something wrong because it does not feel like that before.

Suggest you try a different petrol first. Maybe if you have the budget, consider one RM30 tank of Vpower Racing to clear the fuel lines or go send your injectors for cleaning.

Then DIY TB cleaning. If your spark cables, distributor and sparks are new then it's probably a fueling problem. Very very rarely does the fuel pump spoil. And if it is the fP, you'll have way more problems than this.

 

[jebatdex]

Suggest you try a different petrol first. Maybe if you have the budget, consider one RM30 tank of Vpower Racing to clear the fuel lines or go send your injectors for cleaning.

Then DIY TB cleaning. If your spark cables, distributor and sparks are new then it's probably a fueling problem. Very very rarely does the fuel pump spoil. And if it is the fP, you'll have way more problems than this.

What do you mean Vpower to clear fuel line? Vpower can sort of cleans the fuel line?

TB usually serviced after how long? Last time serviced about 1 year ago

 

[vr2turbo]

your fuel lines could be clogged.

Seldom hear fuel lines clogged, either fuel filter or the injector itself....:hmmmm:

---------- Post added at 08:11 AM ---------- 6 hour anti-bump limit - Previous post was at 08:08 AM ----------

Guys

I can feel small jerking while slow acceleration of my car. While cruising, OK. What I know jerking is caused by:

1) spark plug cable (relatively new 1 month)
2) fuel filter (about 6 months old)
3) distributor (change new one 3 years ago)
4) spark plugs, air filter (all new, just serviced my car)

What else should I consider? I am thinking about the fuel pump (inside the fuel tank). This is since it never get changed, still using original one, the car already 18 years. Should i change it anyway?

Thanks in advance.

When did you feel the small jerk? After latest service, after change plug cable?

 

[Izso]

What do you mean Vpower to clear fuel line? Vpower can sort of cleans the fuel line?

TB usually serviced after how long? Last time serviced about 1 year ago

Yes.. Vpower RACING (not vpower green) can do wonders with the cleaning agents in the fuel.

TB usually serviced every month for me. But I DIY since it's a very easy job.

And VR2turbo brought up a good point - petrol filter.Get that changed too

 

[jebatdex]

Yes.. Vpower RACING (not vpower green) can do wonders with the cleaning agents in the fuel.

TB usually serviced every month for me. But I DIY since it's a very easy job.

And VR2turbo brought up a good point - petrol filter.Get that changed too

OK then, I will DIY to clean TB soonest. Also, will get the fuel filter. Can change la since it is not very expensive. Even original proton almost RM60 only:

Proton Parts Centre Online - FUEL FILTER

Is it better to get this or just buy from spare parts shop (regardless the price)? Or maybe outside there there is better (thus more expensive) filter than proton one?

 

[Izso]

OK then, I will DIY to clean TB soonest. Also, will get the fuel filter. Can change la since it is not very expensive. Even original proton almost RM60 only:

Proton Parts Centre Online - FUEL FILTER

Is it better to get this or just buy from spare parts shop (regardless the price)? Or maybe outside there there is better (thus more expensive) filter than proton one?

That's expensive. I bought mine for RM20 and it's ori OEM. Not proton brand la but as long as it works and is good quality, it's good enough.

Btw, TB cleaning isn't absolutely necessary to be so frequent, I'm just stupidly obsessive about these things.