Hey guys i got a 94 jeep cherokee 4x4 4.0 my jeep is being really sluggish like no power pedal to the floor and it dosent wana go at all. And then all of a sudden itll throw you in ur seat and take off but only after like i press pedal to the floor and then after it goes normally itll drive great and then itll start bucking till you let off and then starts bogging down again. All plugs and wires got switched out and brand new. Any ideas.? I know im guessing its a fuel or spark issue i jus wana get some more info before i rip stuff apart.

 

Grab a fuel pressure tester....

 

^^ Check fuel pressure. Also go online and learn how check your Throttle Position Sensor otherwise known as a TPS. Good luck

 

Did it start immediately after replacing plugs/wires? Cap/rotor also?
Anything else done recently?
Auto?