Dual carb idle problem

[Jim Roach]

It’s been a while since I’ve posted something but I follow regularly. I have had  my truck at my friends garage for over a year installing my front disc brake kit from Rusty Hope, the dual master cylinder from a Jeep as well as my dual carb setup. We got it running but it idles at full throttle. We tried adjusting the linkage but that didn’t help. I rebuilt the carbs a few years ago and we’re getting fuel to both carbs. Other than that I don’t know what to add. Any thoughts or questions that might help me diagnose the problem?

 

[kencombs]

First make sure the idle stop screws rest on the correct stops.   And show a closeup pic of that area when the throttle is closed.  Also check for air leaks. 

[John-T-53]

You'll have to look closely to see what's prohibiting the linkage movement to close the throttle. Note the linkage rod between the cross shaft and carb #1, this may be hitting the manifold and you might have to grind out a small relief. 

[Jim Roach]

Thanks for your thoughts. I’ll check it out as soon as I get home after Thanksgiving. I’m spending time with my sister’s family in Broken Arrow OK and my grandson from Army Ft. Sill OK. 

[Jim Shepard]

What Jeep M/C did you use?

[Jim Roach]

Jim,  Off the top of my head I cant remember. I have been accumulating parts literally for years until I had time to install everything. I think I still have the box so I’ll check the part number when I get home. 

[bkahler]

Jim, I'm curious as to why you set your throttle linkage the way you did.  I've installed the same intake manifold as you did but when it came time to fabricate the throttle linkage parts I looked at bunch of other dual carb installs and I believe all of them had the linkage set just the opposite of yours.  Here's picture of how mine is currently configured.

 

 

 

I'm wondering if its possible when you're pushing on the gas pedal you're actually closing the throttle plate?

 

Brad

 

[Jim Roach]

You might have a good point. Your’s makes mine look incorrect. I’m going to redo mine and I’ll let you know how I make out. 

[Jim Roach]

Well, finally getting my truck back from the shop. My friend had it in his shop for over a year trying to work on it, but he got so busy he didn't have time to finish. Next week I'll take it to the muffler shop for the exhaust. Then I'll try and tackle the "rev" problem. BKHLER noted that the linkage was installed incorrectly, so that is where I'll start. Hopefully that's the problem and I'll be set. Fingers crossed.

[Jim Roach]

Jim Shepard,

 

You wanted to know what Jeep MC I used, here is the box. I don’t remember what year it was. I hope this helps. 

Edited December 10, 2021 by Jim Roach

[bkahler]

On 12/8/2021 at 4:10 PM, Jim Roach said:

Well, finally getting my truck back from the shop. My friend had it in his shop for over a year trying to work on it, but he got so busy he didn't have time to finish. Next week I'll take it to the muffler shop for the exhaust. Then I'll try and tackle the "rev" problem. BKHLER noted that the linkage was installed incorrectly, so that is where I'll start. Hopefully that's the problem and I'll be set. Fingers crossed.

 

 

Nice looking truck

 

[Jim Roach]

Which one?

[bkahler]

14 minutes ago, Jim Roach said:

Which one?

 

The one on the trailer of course!

 

 

 

[Jim Roach]

I know, just kidding.