Damnnit! 6 Pack linkage Binding up?

[RM23M9A]

I have an A12 Super Bee, I have been having "Issues" with linkage binding. Sometimes it's with engine HOT, or after sitting.. I open up CENTER carb to WOT, and outboards WON'T open without forcing one of the diphragm pods by hand, then all 3 work fine, for a while. Seems like now, (after reading all of this) could be a throttle shaft or bushing problem? The 2 4365 outboards are NEW Holley's, but by now Im sure most know Holley now is JUNK. Center 4144-1 is the ORIGINAL carb to the car..
Could be a misaligned baseplate, as I DID install a "SIX PACK PERFORMANCE" plate on rear carb that has ANGLED 45° Idle/Air screws..
Could be THAT baseplate.
Once I get the 2 end carbs Un-stuck, it runs killer... But? After it sits, there's that damnned "Binding Up" again.

 

[Red63440]

Was it binding before you added the plate on the rear carb?

 

[493 Mike]

Any leakage in the secondary diaphragms? Perhaps the center carb has a restriction in the venturi port, not providing sufficient signal to the secondary's. Does the closing linkage slide freely?
Mike

 

[BSB67]

It is unlikely linkage binding comes and goes with temperature.

Some six pack outboard throttle plates will stick in the bore. There are a couple of possible causes and cures.

 

[1 Wild R/T]

What's the number stamped into the outboard throttle blades? If it's 266 then you have early carbs with a known problem

 

[Tony Tee]

Saw a cool video on YouTube Nicks garage testing the 6pak on a A12 roadrunner. Had a similar problem with many camera views of it working and not working and working again. Maybe watching it will help ?

 

[RM23M9A]

Was it binding before you added the plate on the rear carb?

Nope, Im leaning toward that being the issue, I figure WHEN it binds again, I'd separate the carbs and see if that's it.
I could put the Holley baseplate back on, hoping A/F mix is pre set. Typically I guess 1.5 turns OUT is correct, hate tuning these things..LoL
But luckily I can.

Thanks a bunch!

 

[RM23M9A]

Saw a cool video on YouTube Nicks garage testing the 6pak on a A12 roadrunner. Had a similar problem with many camera views of it working and not working and working again. Maybe watching it will help ?

Thanks! I'll look for that. He knows his stuff!

 

[RM23M9A]

What's the number stamped into the outboard throttle blades? If it's 266 then you have early carbs with a known problem

View attachment 1150147

View attachment 1150146

Oh wow! These printings are GOLD! I try save em when they come up, THANK YOU!

Since they're "New" carbs, I'm sure either one is canted a bit at an angle? Or have a shaft bore sticking.. Ye ole "6 Pack's are Problematic, BUT when they RUN? Be afraid"...lol

Really apreciate that!!
Thanks a bunch!

 

[RM23M9A]

Any leakage in the secondary diaphragms? Perhaps the center carb has a restriction in the venturi port, not providing sufficient signal to the secondary's. Does the closing linkage slide freely?
Mike

Yep, once they DO open up, they operate smootly, can open them by drawing on the hose (when unhooked) from center one.. Diaphragms are new, and I did switch out the white springs for the lighter GOLD ones.. Was very careful to make sure everything sealed up.. I thought there was supposd to be a Check Ball within those outboards? Haven't seen one.. Not even with the new 4365's. I still have a BRAND NEW 4144 in the box.. As Holley doesnt do "Returns"..

Thank You!!
(I'll double check those)

 

[RJRENTON]

Saw a cool video on YouTube Nicks garage testing the 6pak on a A12 roadrunner. Had a similar problem with many camera views of it working and not working and working again. Maybe watching it will help ?

Personally, I would not ask Nick of Nick's Garage fame (?) for the time of day.....the info is too contrived. As for the OP's information, the HOLLEY R-4144 carb is not NOS but at a aftermarket replacement especially for an origional A-12 Road Runner. The information suggested by 1 Wild R/T is spot on as suggested by the Chrysler publication....review it....understand it....it will fix the problem.
The origional Holley carbs for a 1969 A12 car are: R-4391 (center 4 speed) or R-4392 (center auto trans) and R- 4393 (Front) and R-4394 (Rear). The "new" Holley carbs leave a little room for improvement. Suggest the Proformax throttle plate base assembly for ease in adjustment of the idle mixture screws of the rear carb. It reuses your thtottle shaft and butterfly valves. Pay attention to the adjustment of the closing linkage of the end carbs to center carb as it can affect the end carb's opening timing. Just my opinion of course.
BOB RENTON

 

[BSB67]

Nope, Im leaning toward that being the issue, I figure WHEN it binds again, I'd separate the carbs and see if that's it.
I could put the Holley baseplate back on, hoping A/F mix is pre set. Typically I guess 1.5 turns OUT is correct, hate tuning these things..LoL
But luckily I can.

Thanks a bunch!

There is no need to separate anything. Go out there now, remove the outboard linkage and give the shaft a light twist to open. If there is initial resistance and then is fine after that it is the throttle plates sticking. If it is smooth, close the throttle shaft with a little force, and then try to open again. There is usally a slight pop when the stuck plates opens.

If the throttle shaft drags over a range of motion, it is the throttle shaft, usually due to base plate twisting from over torque and thick gasket.

 

[lewtot184]

There is no need to separate anything. Go out there now, remove the outboard linkage and give the shaft a light twist to open. If there is initial resistance and then is fine after that it is the throttle plates sticking. If it is smooth, close the throttle shaft with a little force, and then try to open again. There is usally a slight pop when the stuck plates opens.

If the throttle shaft drags over a range of motion, it is the throttle shaft, usually due to base plate twisting from over torque and thick gasket.

this is the first place i'd look. not rocket science to fix. some people try to run the linkage tight, which won't work, but that's other issues.