anyways how are doing mang? long time no hear from u..

ohai lol. so suddenly?

The screw which tuned with a sparkplug basically is the A/F for Idling only...no use

For Carb tuning you need to tune something else and for Aisan Carbs on 4G13/15 can get 150% more torgue after tuning compared to stock

Kyheng, stop giving bad advice and superficial info on cars. Read your replies on removing positive terminal vs negative terminal. First time i join a forum to correct and taruh people back! Your knowledge on car is very very bad..LOL!

hi expert,
may i know how to adjust the air/fuel mixture screw? mine 4g13p carburetor, the screw was protected inside a steel ring, do you know how to adjust it?

What is the prupose of install the battery meter ( volt meter) in the car ? why we need to know the voltage ?

lari topic ni....

anyway volt meter to measure voltage..... some pipu wana regulate their voltage at all times~~ why do we wana do this? cause we like to make sure everything works as is

Hi guy's and sifus,please help,I'm having a jerking acceleration while in middle of 140km trying to increase my speed and while to tarik pickup in 2nd gear or sometimes in 3rd gear mostly around 80km.i was thinking the only problem is the carb,before overhaul and change the parts with new carb service kit was already done,new fuel filter, open stadium air intake,Arospeed 10.2mm plug cable,but still make my nose itchy. FYI mine is old saga 1989 4G15.Is that related to the mixture setting? Anyone guy's?BTW i like to wish Selamat Hari Raya to whom celebrating it.tq

any good place and reasonable price to tune 4g13 (carburetor a/f ratio and distributor timing)? should be below RM100, right? thanks

This post has been edited by alexwsk: Aug 31 2016, 02:58 PM

Hello, nice to meet you.
Im a newbie first time to join this website forum, and I just face a freaky problem after rebuilt my saga 12v carburetor ,
Firstly I got no petrol inject by the chamber linkage when rotate the pulley,
then found the plunger rubber flatted and use carburetor cleaner and airgun to clean the clogged jet, problem fix.

after i install and start the car then second problem coming up like smash on my head,
engine keep 5k rpm un til i switch off my car to prevent engine blow up.

Really no ideas whatt happen with that carburetor. need help and Urgent.
Wish someone carburetor experts can help.
If not i gotta spend more money to find another better carburetor.

Thank You Very Much.

Hi experts..my 4g13 has been sitting for 8 months and now im going to rebuilt..after fix several problem now my car is starting but the engine died after a few second..
Im suspecting the carburetor but i cant tell which part..can anybody help?

Other info :
Cranking
New plugs
New distributor
Working fuel pump
New fuel filter

hey guys..

want to check i'm having problem like

but the sputtering is only when i start my engine (morning or afternoon)... sometimes ok sometimes not ok..
very troublesome sometimes, when after trying 5x time without success to start,
i open up and push push the piston like thingy, then when i try again can jalan ..

seems like when i start the thing is unable to be regulated, and giving too much air or too little air until engine mati

is it due to something blocked or what ? anybody know where i can go to get experienced help ?

This post has been edited by JinXXX: Nov 20 2016, 07:54 PM

The hidden screw is tuned using a special tool. Can buy from tool shops.

Tuning an engine depends on purpose of tuning, mods done, advance setting and engine condition. No magical bullet. That's why experienced mechanics do it better.

Ok. Your case, from my limited understanding and experience, the reason they ask you to go back to stock intake is like this. You can correct me if I am wrong. The problem with cold air intakes is that you have a tendency to cool the intake manifold too much. Petrol does not burn in liquid form. It burns in vapour form, that means gas form. That's why some people call it gasoline. If you look at you manifold, there is a water manifold. That is to warm it up so that the petrol can evaporate. When you put the CAI, you cool it so much that the mixture cannot evaporate in time. If you notice, pick up is fine, in lower gears also actually ok. Only top speed runs semput a bit. Original intake gives it some warmth. If it's too cold, there is a pipe to draw warm air from the exhaust manifold. That's also why older NA F1 engines have the injectors before the throttle body not before the valves like our engines.

Another possibility is that there is not enough swirl. Mixing not enough

Sorry if too long.

This post has been edited by sakaic: Nov 20 2016, 10:40 PM