1992 comanche 4.0 5 speed sat for 4 years with a bad fuel pump. Pulled it out of the weeds recently to get it running. Dropped the tank did a full cleaning, new pump new filter and she fired up. On the second drive she started sputtering and missing at about 40mph and it has drastically gotten worse. Takes a second to start but idles fine, will rev up fine in neutral as long as I'm easy on the throttle but once in gear it falls on its face throughout the whole rpm range. Spits sputters back fires through the intake, and won't gain speed. Sometimes if you keep it floored it will get through the sputtering and bucking and just take off with all the power in the world. Like I said new fuel pump, new filter, since the problem occurred ive replaced tps, cap, rotor, wires and plugs