nmchuck Posted August 6, 2023 Author Share Posted August 6, 2023 What about your fuel pump? Have you checked or changed it? I replaced the fuel pump about a year ago shortly after I bought the truck. Probably would be a good idea to pull the line off the carburetor to verify flow. I think it is probably ok though, I have a clear filter on the line, which is nearly empty when the truck acts up. This morning it cranked over and started easy, and the filter is full. When the truck is running poor, if I pull the line from the carb inlet there is a lot of pressure and gas vapor. It actually is pretty dangerous as it spews this mix all over the hot engine bay. Link to comment Share on other sites More sharing options...
grumpin Posted August 7, 2023 Share Posted August 7, 2023 I replaced the fuel pump about a year ago shortly after I bought the truck. Probably would be a good idea to pull the line off the carburetor to verify flow. I think it is probably ok though, I have a clear filter on the line, which is nearly empty when the truck acts up. This morning it cranked over and started easy, and the filter is full. When the truck is running poor, if I pull the line from the carb inlet there is a lot of pressure and gas vapor. It actually is pretty dangerous as it spews this mix all over the hot engine bay. Man, that's strange to me. How's the tank vent? Have you tried loosening the gas cap or taking it off when it's doing it? Link to comment Share on other sites More sharing options...
Gary Lewis Posted August 7, 2023 Share Posted August 7, 2023 Man, that's strange to me. How's the tank vent? Have you tried loosening the gas cap or taking it off when it's doing it? Have you replaced the rubber hoses? On Dad’s truck they were so porous that they allowed air in, killing the pump’s vacuum. It would run ok for a few miles and then stall. There’s a hose from the tank to the steel line on the frame, and one from the steel line to the pump. Link to comment Share on other sites More sharing options...
myrl883 Posted October 13, 2023 Share Posted October 13, 2023 When the truck is running poor, if I pull the line from the carb inlet there is a lot of pressure and gas vapor. It actually is pretty dangerous as it spews this mix all over the hot engine bay. This makes it sound like a carburetor bowl vent problem. If you have pressure in the carb, you can't pump any fuel into it! Link to comment Share on other sites More sharing options...
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