| JohnA | -- 05-21-2022 @ 5:17 PM |
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I have a 1948 Ford 2dr sedan with a holly 94 model 59. the car sat all winter, but fired up ok in spring. Yesterday drove to coffee shop about 3 miles return, drove great on way up, but on way back started sputtering and would not idle. This carb has been rebuilt by fellow member several years ago and has run fine,took carb apart blew out all jets etc looked ok inside. Any thoughts ??.Johna
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| Carcheologist | -- 05-21-2022 @ 6:12 PM |
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I would check the float to make sure it doesn't have a hole or bad solder joint which would allow gasoline in. The result of that is if the float sinks, it can flood the engine and make good idle impossible. Next, check the power valve to make sure it isn't leaking which can also cause a similar problem with too much fuel resulting in idle problems. Also check to make sure you don't have a vacuum leak at the fitting below the carb on the manifold. Vacuum leaks can also cause poor idle conditions.
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| carcrazy | -- 05-21-2022 @ 7:51 PM |
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One rule of thumb with a spark ignition engine is that when running problems are encountered, 90% of the time it is caused by an ignition issue. Your coil may be dying or a connection somewhere in the ignition primary circuit may be marginal - a loose or corroded terminal may be the culprit. Dirt in the fuel system could be causing the engine to run roughly. A failing fuel pump could also be the cause of the problem if the engine loses power under acceleration or when climbing hills. If the fuel tank vent is plugged, the engine will run poorly. This can be detected by removing the fuel tank cap while the engine is running to see if the problem goes away.
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| ford38v8 | -- 05-22-2022 @ 12:05 AM |
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The next time it does that (and dies), do two simple things: Check for spark at one of the plugs, and check for fuel in the bowl by punching the throttle (ignition off), while looking down the throat. Always good to know which system is at fault. Alan
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| JohnA | -- 05-22-2022 @ 8:32 AM |
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will try punching throttle while looking for good stream
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| JohnA | -- 05-23-2022 @ 12:06 PM |
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Did punch throttle and good amount of gas coming through, ran good this morning I think I'm going to learn how to use vacuum gauge, maybe sticking valve, if it is what can i do about it ??Johna
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| sarahcecelia | -- 05-23-2022 @ 2:43 PM |
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Add some (maybe 8 oz.) Marvel Mystery Oil to your fuel tank and to your crank case oil. It will do no harm, and might solve your problem. (It has been recommended on this forum before by others at times)
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| JohnA | -- 05-23-2022 @ 4:35 PM |
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Thanks, again, Johna
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