I have an 85 Dodge ram 1500 5.2 4x4 auto has 117,000 miles it starts up and runs perfect until the engine warms up then without warning it just dies no sputter just off like you turned the key it will still turn over but won't fire until the engine cools down for about 20 minutes I have installed new fuel pump fuel lines and fuel filter also new distributor cap and rotor and distributor coil. Any help would be greatly appreciated.