upon accelration i loose power and get a bit of back fire idle is fine but on 1994 Dodge Ram 1500

changed the map senson also had to remove the cat converter

Asked by for the 1994 Dodge Ram 1500
You say you removed the cat converter. What do you mean by this? It sounds like the cat is clogged causing vehicle not to run correctly. If you removed the cat and the car drives better that is definently your problem.