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 How To Tune Air/Fuel Ratio (4G13/4G15 Carburetor), Need ur help guys

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LionelStep
post Oct 24 2012, 12:32 AM

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QUOTE(mmaher22 @ Feb 19 2012, 10:29 PM)
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Dear all  i need to know  what is function of screw in picture which marked with bblack line and how to adjust it caz i found it losen
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Hi forumner, for the picture shown, please teach me how to access the 4G13 throttle body - throttle plate (or also named as throttle buttlefly valve), which are the screws or items to be removed or dismantled? Thanks !
LionelStep
post Oct 24 2012, 08:17 PM

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QUOTE(sinister_sid @ Oct 24 2012, 01:04 AM)
a efi system throttle body or a carburetor throttle flap ?
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Thanks for your question to clarify, it should be Carburetor Throttle Flap. This 4G13 I am having is carburetor type. I have put photos and quick questions in this thread, appreciate help to reply if you know, thanks so much ~~


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LionelStep
post Oct 24 2012, 09:10 PM

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QUOTE(sinister_sid @ Oct 24 2012, 09:02 PM)
u flip the carb upside down u can see the butterfly , two screw that hold it , need impact screw to remove the screw , and to take the shaft out u have to basicly dissassemble the entire carb
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You mean, based on the photos which I showed, the throttle butterfly can be reached from below ?
I just want to clean up the throttle butterfly only.

And what is the function of the shaft actually ? Do I need to dismantle the shaft?
Just in case I remove the two screws in red, can I still clean the throttle butterfly without having to take out the entire carburettor ?
LionelStep
post Oct 30 2012, 01:07 AM

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QUOTE(sinister_sid @ Oct 25 2012, 02:35 PM)
yes u can get accsess to the butterfly at the bottom , if u wanted to clean it i dont see the need to disassemble the butterlfy , just a simple turn of the spindle u can clean the entire butterfly
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Please advice what are the ways to access to the throttle butterfly valve if I do not remove the 4G13P carburetor from the car ? Thanks ~~
LionelStep
post Oct 30 2012, 08:39 AM

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QUOTE(sinister_sid @ Oct 30 2012, 03:27 AM)
no other way , simple solution , use carburator cleaner to get ur butterfly clean of dirt and carbon
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1. Please advice, can we just spray carburetor cleaner into the 4 holes in yellow of the picture?

2. And secondly, in case I still want to attempt to access the throttle butterfly valve without taking out this carburetor from the car, can I just remove the 2 screws in red circle in the picture (and plus one more screw under which cannot be shown on the carburetor view), only 3 screws, then I can remove the front housing, and access to the throttle butterfly valve ?


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LionelStep
post Oct 31 2012, 12:09 PM

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Thanks for advice ~~ so, it seems it is too complicated to see the throttle butterfly with carburetor still in the car. So will you suggest that I can only spray the carburetor cleanner through the 4 holes when engine is still running ?

And if it is the correct way, then I would only need to remove the circular air filter, which is relatively much simplified work...

[quote=sinister_sid,Oct 30 2012, 08:40 PM]
u spray carburator cleaner with engine running , the cleaner will be suck by the induction along with the dirt , u will get a clean surface , yes u can spray inside the breather hole and air bleed hole , and result to flooded system and make ur engine hard to start

removing the front screw will gain u access to the variable ventury piston housing and the piston itsself and to remove the piston u have to take out a screw on the top , yep it will gain u alittle access to the buterfly , but with the risk of spring falling into the intake manifold , that time it will be fun rclxm9.gif

LionelStep
post Nov 1 2012, 12:43 PM

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[quote=LionelStep,Oct 31 2012, 12:09 PM]
Thanks for advice ~~ so, it seems it is too complicated to see the throttle butterfly with carburetor still in the car. So will you suggest that I can only spray the carburetor cleanner through the 4 holes when engine is still running ?

And if it is the correct way, then I would only need to remove the circular air filter, which is relatively much simplified work...

[quote=sinister_sid,Oct 30 2012, 08:40 PM]
u spray carburator cleaner with engine running , the cleaner will be suck by the induction along with the dirt , u will get a clean surface , yes u can spray inside the breather hole and air bleed hole , and result to flooded system and make ur engine hard to start

removing the front screw will gain u access to the variable ventury piston housing and the piston itsself and to remove the piston u have to take out a screw on the top , yep it will gain u alittle access to the buterfly , but with the risk of spring falling into the intake manifold , that time it will be fun rclxm9.gif
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[/quote]

Hi sinister_sid, so, am I correct to just spray the Carburettor Cleaner into the 4 holes when engine is running ? Thanks so much !

 

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