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Regular
Posts: 86
Location: Norfolk, VA | I first posed this question to the forward look forum on FB but I still need a little more input. This carb was rebuilt a few years ago by the PO. SO, Initially, I went out to start the fury one morning and fuel started pouring out of the bowl vent valve in huge amounts. Per advice on the forum I gently tapped fuel inlet valve a few times with a screw driver and that solved my problem and it hasn't returned but it created a new one. Now I have a high idle. I didn't make any adjustments after tapping the fuel inlet valve. However, neither the fast idle lever or the idle speed adjusting screw makes any difference after adjustments. The fast idle cam works accordingly. I can return the throttle lever back to it's resting position by manually pushing the lever back towards the fire wall and the idle returns to normal. However once I push the accelerator pedal down the throttle lever returns to that higher position despite none of the idle screws touching the mechanism. The choke doesn't seem to be the issue. In my limited knowledge it seems to me as if something is preventing the throttle lever from returning to it's original position but I can't seem to figure it out. It's been advised to me to rebuild the carb again but I'm looking for an immediate fix and I'm not sure what's my next step. thanks everyone. |
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Expert
Posts: 2289
 
Location: Eastern Iowa | Just a thought here....
Isn't there supposed to be a tiny wound hairspring on the shaft to do that6 when then throttle returns to normal.
If so, sounds like the tiny tang on it has broken off.
Once had that issue on one of the carbs on my F and had to rob that spring from another 4 bbl I had for parts.
Check the exploded views in the parts book, that may show the spring if indeed there is supposed to be one.
Edited by finsruskw 2021-07-17 9:17 AM
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Regular
Posts: 86
Location: Norfolk, VA | there currently is a spring on the throttle shaft if that's what your referring to. I have to apply significant pressure to push the throttle lever back to it's original position. It's not going back lightly. |
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Expert
Posts: 4036
Location: Connecticut | Your throttle linkage is binding on something. It could even be up near the gas pedal. Trace the whole thing. Ron |
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Elite Veteran
Posts: 827
Location: Northwest Iowa | just a thought
is your throttle return spring hooked up in the proper position ? |
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Regular
Posts: 86
Location: Norfolk, VA | I like this, I crawled underneath and all the linkage looks free and clear.
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Regular
Posts: 86
Location: Norfolk, VA | yes.  |
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Board Moderator & Exner Expert 10K+
Posts: 13045
 
Location: Southern Sweden - Sturkö island | My guess is that the float level is wrong , this can Lead to that fuel drains into unwanted trails.
Another possible fault minght be that the throttle valves are wrongly adjusters when mounted.
In Short, the carb needs a proper rebuild and adjustment. |
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Regular
Posts: 86
Location: Norfolk, VA | yes, I believe so. The car has been driving and idling fine for over 2 years except for this episode. |
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Regular
Posts: 86
Location: Norfolk, VA | I have the receipts from the Mopar shop in Denver where they rebuilt the carb but it's possible that despite it driving fine for the last 2 years that it could now require a rebuild. It just seems odd to me that it's just now acting up. |
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Regular
Posts: 86
Location: Norfolk, VA | So, I ordered a Carter rebuild kit and will find a local shop to rebuild it for me. In the meantime I simply stick my toe behind the accelerator pedal and pull it back towards me and the idle immediately returns to normal. Thanks for all your suggestions. |
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Expert 5K+
Posts: 9650
Location: So. Cal | If that is what is happening, your throttle plates aren't lined up properly on the shaft. They must have removed them during the rebuild and didn't line them up well before tightening them down. Either that or you have issues with your return spring tension. |
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Expert
Posts: 4036
Location: Connecticut | My money is on the throttle return spring either being incorrect or situated in the wrong location. Most rebuilders wouldn't mess with the throttle body plates unless they were damaged. Aaron - can you post a photo of the throttle return spring as mounted on the car ? Ron |
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Regular
Posts: 86
Location: Norfolk, VA | I'll take a photo today and upload it.
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Regular
Posts: 86
Location: Norfolk, VA | here is a photo of my carb set up
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 IMG_3177.jpeg (210KB - 128 downloads)
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Regular
Posts: 86
Location: Norfolk, VA | How do I upload the photo so that it's visible in thread instead of an attachment?
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IMG_3177.jpeg (210KB - 129 downloads)
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Expert 5K+
Posts: 9650
Location: So. Cal | You have to save the file with a .jpg extension instead of .jpeg. I literally just changed the extension and now it works.
 (IMG_3177.jpg)
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IMG_3177.jpg (210KB - 132 downloads)
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Regular
Posts: 86
Location: Norfolk, VA | great, thank you |
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Board Moderator & Exner Expert 10K+
Posts: 13045
Location: Southern Sweden - Sturkö island | Came to think about the acceleration pump plunger - I have seen that some rubber can't deal with the modern fuel - disconnect the lever to the acceleration pump and check if the carb goes back to normal idle position. If so, then you need to find either anothe rubber plunger or an old leather type. The leather type must soak in gasoline overnight for to work good.
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Regular
Posts: 86
Location: Norfolk, VA | thanks for the suggestion, I'll check it out this weekend. |
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61 Fuy 318 high idle on rebuilt BBD carb
