High idle - Open throttle - New carb

[Thirdeye00]

I recently got my Plymouth running. It's been running fine for a week. Now it's idles high. I manually close the carb and it idles down. I posted pictures of the carb setup if anyone can see anything or point me on the right direction.

 

[493 Mike]

Where did you find that carb? I have never seen one like it.
Mike

I did not notice the acc. pump linkage yesterday. That's why I remarked about the appearance. The lower slot in the pump should be under the washer and adjusted with a clip to get the correct bowl vent opening. The pull off adjustment looks out of wack too.
Mike

 

[hofferwood]

Looks like you could use more tension on the return spring.

 

[Thirdeye00]

Where did you find that carb? I have never seen one like it.
Mike

I got it from National carburetor. ND2267 Chrysler, 1966-1973, 273"-318", W/Out Bowl Vent Pipe in Airhorn, Carter-BBD

 

[turbine68rt]

Like hofferwood stated, is that an aftermarket return spring as well as the kickdown spring? It doesn't appear you have any preload tension on either one.

 

[RJRENTON]

Where did you find that carb? I have never seen one like it.
Mike

The carb is a Carter 1-1/4" BBD 2 barrel. The hot and cold idle adjustment screws are on the spring side or the side where the throttle cable attaches. The screw closest to the linkage bell crank arm is the hot idle speed screw; the other screw would contact the fast idle (cold idle speed) screw notched or stepped counterweight cam. Take a pix of the linkage side of tthe carb.
BOB RENTON

 

[turbine68rt]

Your accelerator pump rod may have something to do with your symptom. It looks like it was bent way out of adjustment forcing the pump stem to sit way too high. Attached is a reference pic.

 

[Thirdeye00]

Here are more pictures.

 

[Thirdeye00]

Your accelerator pump rod may have something to do with your symptom. It looks like it was bent way out of adjustment forcing the pump stem to sit way too high. Attached is a reference pic.
View attachment 1687168

I circled the places on my carb. Is that what you are talking about? The circle on the right, does the bar need to go to the left hole?

 

[Thirdeye00]

Like hofferwood stated, is that an aftermarket return spring as well as the kickdown spring? It doesn't appear you have any preload tension on either one.

Are you saying both of these springs need to have more tension? Yes, all the springs are new/

 

[68BabyBlue]

That kickdown spring looks loose. Had a similar problem with my GTX last summer after I knocked it loose while detailing the engine for Carlisle, and re-attached it in the wrong location. Finally figured it out last month.

 

[turbine68rt]

I circled the places on my carb. Is that what you are talking about? The circle on the right, does the bar need to go to the left hole?

View attachment 1687436

Compare the shape of your rod to the one in the reference pic