88 ram help

I guess you have changed all the obvious, plugs,wires,cap,rotor? That may not fix it, but it sure won't hurt it. While the truck is running look down in the throttle body at the injector. Make sure it is misting the fuel down the throat and not dripping it. Sometimes when those old throttle bodies set up the fuel in them will clog the spray tip on the injector. I don't know of any other way to clean it if you already run cleaner through it, may try to take it out and soak it in some sea-foam. But your problems sounds more like a fuel problem than anything else, may not hurt to hit it with a timing light though