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| Standard Vitara Mikuni Carb Idle Adjusting Help. https://www.auszookers.com/forum/viewtopic.php?f=5&t=20189 |
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| Author: | FullyZooked [ Mon Mar 21, 2011 12:06 am ] |
| Post subject: | Standard Vitara Mikuni Carb Idle Adjusting Help. |
I would be ever so greatful if someone could please provide pictures and details as to which screw to set both cold and hot idle speeds on the mikuni. For future reference for fellow searchers maybe the adjustment location for choke and the setting procedure. I have searched all over and cannot find any info? I even went and purchased a Haynes manual today that is a POS and has next to no detail regards this  .
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| Author: | FullyZooked [ Mon Mar 21, 2011 10:38 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Surely someone knows the Vitara Carbs? |
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| Author: | atari4x4 [ Mon Mar 21, 2011 11:09 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
 i know nothing
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| Author: | FullyZooked [ Wed Mar 23, 2011 12:57 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
It seems we are all in the same boat. Working on cars no problem but not the carb. Maybe someone has a link to info? Would be a great asset to the site. |
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| Author: | shakes [ Wed Mar 23, 2011 1:02 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
carby's are alot like auto electrickery... alot of people think they know what they are talking about, but only know enough to get themselves into trouble |
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| Author: | SuziBlu [ Wed Mar 23, 2011 1:06 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
atari4x4 wrote: :oops: i know nothing
aaaahahahahaaaa, ya finally come clean, woohoooo yess yess oh yesss, er, ahem, that is to say, sorry, cant help either. |
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| Author: | buzbox [ Wed Mar 23, 2011 1:09 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
I don't have the workshop manual with me at the moment, But I'll try to get some info out of it which may or may not help you out. I'll post it up tonight. But in the meantime, youtube is your friend. Sure they're for Holley carb's but pretty much same principle applies. http://www.youtube.com/watch?v=TCurlDWBr9k http://www.youtube.com/watch?v=6vKlAnKdcB4 |
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| Author: | FullyZooked [ Wed Mar 23, 2011 1:10 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
That's why I want to keep this top of mind. Surely someone with Vitara Mikuni experience will drop by and bless us with their knowledge. |
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| Author: | FullyZooked [ Wed Mar 23, 2011 1:18 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
If you could please post the info tonight that would be great buzbox. I have no problem tuning a Carbs air/fuel ratios but need to know where all specific screws are located i.e hot and cold idle screws, idle mixture screw. Thanks again. |
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| Author: | SuziBlu [ Wed Mar 23, 2011 1:30 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Im sitting doing nothing, so I thought I would have a search of the web for ya, nothing found for motor car engines, only for motor bike engines, shitloads of info for them, tons, but nothing for cars, sorry. |
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| Author: | FullyZooked [ Wed Mar 23, 2011 2:07 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Just remember Suziblu we are chasing this specific details on the Mikuni found on G16A's. I have faith in thy' fellow auszookers! |
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| Author: | SuziBlu [ Wed Mar 23, 2011 2:14 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
The only reference I found was in a suzi forum from 2007, israily bloke asked, answer was a smart arse one. Parently the last of them was 1988, that is all I could find, no other reference. |
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| Author: | matty_wall [ Fri Mar 25, 2011 3:51 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Ive been having trouble with my vitara carby as well. Idle up not working. Running rich. Cant hold idle when slowing down, resulting in staling sometimes. I'm gonna spend the weekend on mine, see if i can contribute some tech that can go into the good tech section. |
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| Author: | FullyZooked [ Fri Mar 25, 2011 7:08 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Ill give you a small piece of the experience I have had. If standing in front of the car, the right back of the carb you will see 3 screws, Two large phillips head screws and one small flat head screw. I have found the small flat head screw increses both cold idle and hot idle? WTF. Thats about as much as I know. I will look forward to your findings. |
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| Author: | FullyZooked [ Mon Mar 28, 2011 5:34 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
How'd you go Matty? Any luck? C'mon Royce your the master of all things tech. Any ideas? |
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| Author: | losfer [ Mon Mar 28, 2011 11:05 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
heres a picture , the red lines point to the arm and the screw for the ac adjustment so you cant mix it up with the others . the cold idle screw you have to open the throttle up to access it. HTH |
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| Author: | Jester [ Mon Mar 28, 2011 7:00 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
thanks, ive printed that out for myself also |
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| Author: | FullyZooked [ Mon Mar 28, 2011 7:47 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
You my friend are a champ! |
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| Author: | FullyZooked [ Mon Mar 28, 2011 7:50 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Shit I've been turning 11 on that diagram to increse idle. Looks to be idle mixture, that makes sense why it raises both cold and hot idle. I don't suppose you know the stock value for this screw? 1-1/2 out? |
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| Author: | FullyZooked [ Mon Mar 28, 2011 8:16 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Is it just me or do you have the hot and cold idle back to front? Would the operating temp idle be on the butterfly arm? Otherwise if adjusted for cold idle the high rpm would stay even when hot? |
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| Author: | royce [ Mon Mar 28, 2011 8:24 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
FullyZooked wrote: Is it just me or do you have the hot and cold idle back to front? Would the operating temp idle be on the butterfly arm? Otherwise if adjusted for cold idle the high rpm would stay even when hot?
No, they are correct, the cold idle speed screw acts against a cam that moves with the choke to reduce the idle speed once hot the hot idle screw acts against the throttle linkage as a stopper the idle mixture I usually go with at temp and idling, timing correct etc, wind it out till the idle speed is as high as it will get then starts to drop and go in a little bit, its not emissions correct but best youll get at home |
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| Author: | FullyZooked [ Mon Mar 28, 2011 11:27 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Right so to get this straight, confused now. The screw in the throttle linkage where the cable runs is the cold idle? The long screw out the side of the carb is to adjust idle when engine is at running temp? I can't get my head around how that could be right. |
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| Author: | losfer [ Tue Mar 29, 2011 7:21 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
well royce told you , the one on the the throttle linkage rests against a cam , as the car warms up , the cam is moved away by a thermal wax element . as the cam moves away the idle decreases until the throttle linkage rests upon the hot idle screw , stopping it from going any further. dont think about it and you wont get confused , just adjust the fucking thing ! as for the mixture screw , screw it in until you can feel the engine start to die and run rough , then wind it out until it just starts to sound sweet again , then another 1/2 turn for good measure |
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| Author: | FullyZooked [ Tue Mar 29, 2011 10:29 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Just got back from the shed and yes I now understand. Had a good close squizz with the worklight and can see how it all works. The carb was governed only by the choke for both hot and cold idles. Turning the hot idle screw 2 turns in or out had no affect. Once I lowered the cold idle I was then able to set the correct idle RPM using the hot idle screw. Awesome. Not only that the bottom end is so much more responsive now! Previously the choke always being partially on must have richened it somewhat. Thanks for the help. |
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| Author: | mavmitchell [ Sat Jul 16, 2011 8:14 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Hi, Not sure if anyone is still looking for solutions to rich idle on G16B with Mikuni. I just spent 3 days chasing this prob down on my Maruti with this engine. I found the secondary butterfly was not closing fully at idle, and it was breating through the secondary. I removed the secondary shaft and cleaned it with wet and dry. Its now not sticky and closes fully every time. Runs like new... |
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| Author: | xrwardy [ Fri Nov 25, 2011 9:57 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
Hi, I also have been searching for info on this carb and bingo i found this 
only trouble is that i can't see the picture, where's it gone? 
any chance of posting it back up please? thanks. |
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| Author: | xrwardy [ Fri Nov 25, 2011 10:37 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
ah, i can see the picture now
what does ac idle up adjust do? or what does ac stand for? thanks again. |
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| Author: | HarryHoudini [ Fri Nov 25, 2011 10:33 pm ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
AC in an Automotive sense is Air Conditioning. |
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| Author: | fritter [ Sat Nov 26, 2011 12:49 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
It increases the idle rpm when the AC is on to compensate for the increased load on the alternator. Cheers |
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| Author: | xrwardy [ Sat Nov 26, 2011 7:49 am ] |
| Post subject: | Re: Standard Vitara Mikuni Carb Idle Adjusting Help. |
thanks guys, mine aint got ac, we don't have use for one in the uk
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