broke a piece of the carb...can you help identify this and it's fnctn?

Hello,
I was rebuilding the carb and as we were playing with the choke plate, this piece of plastic snapped off. I don't know exactly what it was attached to but it looked like maybe a rod hooked through it?

Anyways, the car starts and seems to run as normal when idling (have not taken it for a drive yet)...but of course this piece was there for a reason, so want to make sure before I attempt anything further...

 

thats a walker products 85-100 lever




there is a rod attached where the top broke.. it connects to the next piece down...

its held on with a tiny C clip...  please remove the C clip and the rod so it does NOT tangle in something and hold the throttle open..  

they should be available online...  or from some carb shops.. most want to sell rebuilds not parts..

i bought a bag of them a LONG time ago.. but i don't have a clue where they are..  

The plastic part looks to be part of the fast idle system that idles up the motor when the choke is functioning, and is taken out of the way as the choke heats up and no longer needed. Operating temp. Why it's having trouble idling when cold.

When cold, it pulls a cam or screw around that's adjustable to get your fast idle cold start rpm's up. Need to make sure, when at operating temp, is fast idle screw is not in contact so your regular idle screw is not defeated.

Last, all this happens after you get the idle air mixture screws optimized, timing set, vacuum leaks and anything that could effect your idle out of the way first. If not, just screwing the idle screw up will run the risk of adjusting the butterflies past the idle air circuits and this is a major thing that happens alot.  

thanks cushman!! It is still stalling after playing with the screws...I put them back into their previous position, ordered the part and it should be with me soon.
I'm glad to hear that this may be the cause of the stalling and hope it will fix it.

Unfortunately, that little area of connections is really confusing. I've been playing with it quite a bit and I just can't see how those will all connect. I've been looking at schematics and pics, but they don't really make sense. Is there any direct photo of an actual carb that has that area all connected? It may become simpler after I take off the round circle lean mix knob sitting in front of it  

Check out some of the photos in my Autolite 2100/4100 rebuild story, they might help with the choke housing and the linkage setup:

http://www.mustangmonthly.com/howto/mump_1201_autolite_carburetor_rebuild/index.html

HTH...
Mark
.  
Mark Houlahan
Technical Editor for:
-Modified Mustangs & Fords Magazine
-Mustang Monthly Magazine

1965 FFR Roadster 427W/TKO-600 5-speed
1966 Mustang 289-4V/C4 Auto
1968 Mustang 4.6L Three-Valve/5R55S Auto
1990 Mustang 306/AOD
2001 Ranger SuperCab 4x4 3.0L V-6/5R44E Auto
2002 Explorer Sport Trac 4.0L V-6/5R55 Auto

Thanks....that was exactly what I as looking for!! Great article and photographs