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ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: dirtzero on October 28, 2009, 08:22:11 AM

Title: 87 sammie high idle after gets up to temp.
Post by: dirtzero on October 28, 2009, 08:22:11 AM

I am building my sammie into a mud machine. Now it runs great except for its idle issue. The choke comes on fine when u start it up then it will idle down but once she gets a little heat in her it will idle at 2500 sometimes as high as 3000. Bliping the throtle does absolutly noting. The gas pedal is not stuck er noting like that. It runs good. Any ideas I was thinking about replacing all the carb vacum lines thinking there is a leak. The sammie smokes but once it gets warmed up it quits. It starts easier then my daily driver but the idle has me puzzeled. any ideas?

thanks jordan

Title: Re: 87 sammie high idle after gets up to temp.
Post by: ebewley on October 28, 2009, 08:49:47 AM

Quote from: dirtzero on October 28, 2009, 08:22:11 AM

I am building my sammie into a mud machine. Now it runs great except for its idle issue. The choke comes on fine when u start it up then it will idle down but once she gets a little heat in her it will idle at 2500 sometimes as high as 3000. Bliping the throtle does absolutly noting. The gas pedal is not stuck er noting like that. It runs good. Any ideas I was thinking about replacing all the carb vacum lines thinking there is a leak. The sammie smokes but once it gets warmed up it quits. It starts easier then my daily driver but the idle has me puzzeled. any ideas?

thanks jordan

There are two idle adjustment screws on a stock carburator. One that is very easy to see and at the back of the carburator, that is the cold or high idle adjustment. The second one is at the base of the carburator and is the warm adjustment. Many people make the mistake of over twisting the cold adjustment and then when the vehicle gets warm it doesn't slow down. A third idle issue can come from the idle up circuit that is adjusted at the back of the carburator and is a flat bolt head that pushes the throttle plate to give a high idle. this comes on when any accesories is turned on. I usually back that all the way off so I don't have that 'feature'...

Try searching for this topic. I think there is a thread that has some pictures of the adjustment screws if you need more information.

Good luck, Eric

Title: Re: 87 sammie high idle after gets up to temp.
Post by: dirtzero on October 28, 2009, 12:04:57 PM

thanks anyone have any pics of where the needles are I dont have a manual and I cant seem to find any pics.

thanks im totally new to the sammie scene so bear with me.

Title: Re: 87 sammie high idle after gets up to temp.
Post by: ebewley on October 28, 2009, 01:28:10 PM

Ok, here's a couple of diagrams that show the adjustments... Once you get out to your vehicle, you'll see them and it'll make sense...

-Eric

Title: Re: 87 sammie high idle after gets up to temp.
Post by: jaunty on October 30, 2009, 10:20:38 AM

i dont know if this is your problem but i actually unplugged the green plug, near the front of the carb and my idle is really smooth and low now.  no more idle up stuff... although a little bit of idle down when i turn lights on.

I suppose if you unplug this and that problem goes away then you found it.

get an FSM, too
www.suzukiinfo.com

Title: Re: 87 sammie high idle after gets up to temp.
Post by: zukwrench on November 28, 2009, 07:24:21 PM

i believe that uses a hot water choke....
an air bubble in the cooling system can cause this.
is the cooling lines at the carb hot to the touch after warm up?