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| | | | Joined: Nov 2001 Posts: 217 'Bolter | | 'Bolter Joined: Nov 2001 Posts: 217 | I have '54 235 with dual carburetors. My accelerator pedal has stuck a couple times while driving. I've never really liked the setup, I used Tom Langdon's dual carb setup. Has anyone found a reliable replacement? This problem has kept me from driving my pickup for the last couple years. I'd like a good solution. Thanks!!!! | | | | | Joined: Feb 2004 Posts: 29,803 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,803 | You have either one carburetor too many, or one not enough. Inline sixes with three siamesed intake ports run best with either one, or three carburetors. The simplest, least expensive way to solve the problem is to go back to what the Chevy engineers decided to use 70-something years ago. I'm building a custom intake setup for a 261 engine that has three Keihin side draft carbs originally used on the Harley Davidson EVO engines.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Feb 2020 Posts: 79 'Bolter | | 'Bolter Joined: Feb 2020 Posts: 79 | Disconnect the linkage at the carburetors, and check the linkage from the foot pedal all the way to the carbs. It should smooth with no catches or scraps, if there is make some adjustments. Check the levers on the carbs are they free and easy? I have found the butterfly rod going through the throttle plate was too tight (my opinion). The sticking would get worse as the engine got hotter. I sprayed some lubricant in that area when it was sticking and it freed right up. I took the carbs off and set them on edge and put lubricant (marvel mystery oil) on the shafts so it would run down inside. That freed them up, and every once in a while when the engine is hot and it feels a little sticky I give them another shot. Also, you may need to put a stronger return spring on your linkage. If your running the original spring those springs get weaker over time.
51 GMC 100 with 59 chevy 261 under the hood.
3 on the floor with 3.42 gear.
| | | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | Take a deep breath, you can fix this.
First, loosen the linkage on both of the carbs and see if you can sort out if the binding is occurring in just that part of the system. Then, connect one carb and see what you get. Connect the secod up and see if you can duplicate the issue. Sometimes its just the linkage is out of adjustment and out of square, other times you will need to make a new rod from the bell crank to the linkage,. But this can be resolved. That linkage set up you have is pretty reliable so something is up. And, yes, as mentioned earlier, you should add a second spring..
Mike
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