Ok I got a 96 ford ranger 4.0 5 speed. While driving it skips jerks and misfire under a load. I have put new plugs in tried a new coil pack cleans the maf and tb and unbolted the cats none of which improved it at all. While driving if I give it throttle at all it starts jumping shipping and misfiring but still gains speed and doesn't seem to be at a loss of power it just does the skipping jerking almost like its running out of fuel. I've also replace the fuel filter. Any other suggestions. I'm stumped