monstercherokee

Rough idel and on occasion and lugs down when I take off??

VTJeep

Haha.. Ok, o2 sensor. 100 bucks.

VTJeep

Now my serious answer: Hey man, it's tough to diagnose this with the limited info you have provided. Year, engine, etc. will really help. Also anything you've done to assess and fix this already. Have you up it ons code reader? That's step one man. No need to just throw parts at it hopefully! I'd also suggest going over ignition system and sensors. Clean grounds and IAC, TPS and TB in general. Then in all seriousness the o2 sensors, essentially bank 1, sensor 2 I'd guess. Also drop your tank and inspect it for a deposits and/or bad pump. 97+ has an in tank pump/filter assembly, pre-97 will be an in line filter.

Turbo X_J

Burned out license plate bulb could cause this too ~ $1.49.

VTJeep

Ha

monstercherokee

97 4.0 already put a map sensor crank sensor. Tune up

VTJeep

Then I say fuel delivery issue, either stemming from clog at tank/pump/filter or, more likely, the o2 sensor. A faulty reading will cause fuel delivery to cut out briefly, resulting in a hesitation, buck, chug and/or popping at the manifold.