I'm trying to diagnose a possible fuel system problem with my 99 Dodge Ram Sport. The truck starts easily, idles properly, and the check engine light is off. When I put the truck in gear and try to accelerate the engine bogs down and tops out at 25-30 mph. I replaced the distributor cap/rotor, plugs, and wires, checked the air filter/housing and hoses, and put in a fresh tank of fuel and some Lucas fuel system cleaner. The fuel pump sounds like it's running and I haven't noticed any fuel leaking... next step recommendations? Thanks!