You probably have a 4 barrel Holley carburetor. Chances are your accelerator pump ( needle and seat) need to be replaced. Just a thought. There are numerous areas to look at from your in tank fuel pump to the fuel regulator to the fuel filters to your mechanical fuel pump on the engine then to the carburetor. You also have a filter where the fuel line goes into the carb. So, as I said earlier, there are several areas in the fuel system to look at. Might be better to have an experienced RV mechanical repairman look at it. With all that said you might have fuel injection. Not sure what year that was introduced to the Chev. 454.
