Recently I have been having carburetor problems and I could use some help figuring out the solution. The carb is a Stromberg 2 barrel on a 259. I have owned the car for several years and the carb worked fine until this summer. The engine began to stall when at idle with the engine warm on occasion. It was possible to re-start the engine and keep driving. Upon examination I noticed there was leakage at the throttle shaft, and gas was dripping onto the intake manifold.
I took the carb off and sent it out for a thorough rebuild. I have rebuilt carbs before, and I considered doing it myself, but I did not have the time and wanted to get it done quickly, so I sent it out. A couple of weeks later I got the carb back and put it on the car.
I started the engine with the rebuilt carb, and it ran great for a few seconds, and then gas started to pour from the top, from where the linkage enters the accelerator pump. I called the rebuilder, who is well known on this board, and he has been very helpful. He suggested that dirt might be lodged in the inlet needle valve, causing the gas to flood the carb. He recommended that I clamp off the fuel supply before the fuel pump, start the engine and let it run to flush the dirt out. So I clamped the fuel supply, started it up and the engine idled nicely for 5 or 10 seconds before stalling. While the car was idling no gas leaked from the carb. I unclamped the fuel supply, started the car up, and 5 seconds later the gas started to pour from the top again. So, I repeated the steps again, but I still have the problem of gas leaking. When I unclamp the fuel supply the gas pours out the top.
The gas tank was replaced about 7 years ago. I doubt that there could be that much dirt in the system that it keeps clogging the needle valve, but I guess it is possible. I have considered running a fuel line to a known clean supply of gas, like a portable gas can, and try again.
I have called the rebuilder again for further guidance, but he is out now. So, I thought I would see if anyone here has any suggestions.
Jeff
I took the carb off and sent it out for a thorough rebuild. I have rebuilt carbs before, and I considered doing it myself, but I did not have the time and wanted to get it done quickly, so I sent it out. A couple of weeks later I got the carb back and put it on the car.
I started the engine with the rebuilt carb, and it ran great for a few seconds, and then gas started to pour from the top, from where the linkage enters the accelerator pump. I called the rebuilder, who is well known on this board, and he has been very helpful. He suggested that dirt might be lodged in the inlet needle valve, causing the gas to flood the carb. He recommended that I clamp off the fuel supply before the fuel pump, start the engine and let it run to flush the dirt out. So I clamped the fuel supply, started it up and the engine idled nicely for 5 or 10 seconds before stalling. While the car was idling no gas leaked from the carb. I unclamped the fuel supply, started the car up, and 5 seconds later the gas started to pour from the top again. So, I repeated the steps again, but I still have the problem of gas leaking. When I unclamp the fuel supply the gas pours out the top.
The gas tank was replaced about 7 years ago. I doubt that there could be that much dirt in the system that it keeps clogging the needle valve, but I guess it is possible. I have considered running a fuel line to a known clean supply of gas, like a portable gas can, and try again.
I have called the rebuilder again for further guidance, but he is out now. So, I thought I would see if anyone here has any suggestions.
Jeff
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