94 Dodge ram 4x4, runs super rough.

I know for a fact the O2 sensor is new. I remember my buddy thinking that was the issue.

Itdid have a major exhaust leak when i first picked up the truck but i made the trans shop fix that.

94 is OBD1(?) so my scanner wont work on the truck.

I don't remember if the truck has a cat.

Thank you!

These all sould like great ideas. I will try all the above and report back.