I have a dodge ram V8 extended van early 90's with a carborator, and it back fires. If I let it sit for a day or two, then take it past 50mph, it will start to backfire. it will, loose energy, and speed. Then, I have to stop every few miles and start again because the van looses energy and I can't go any faster than 30mph to 35mph while the whole time it back fires. Does anybody have any insight as to how I can fix this problem? Is it the carborator, distributor cap, plugs? What does anybody think is the problem?
Thanks if anyone can help,
Bill