Please help me out.
Hey guys new here but not to wheelin haha
So hereâ€™s the deal within the past two weeks Iâ€™ve bought a bone stock 99 XJ that had 171k miles on it. It ran great. Drove great.
My plan was to take everything off my old 90 model I had and instal on the newer RUST Free body and get a few upgrades interior wise and what not.
Okay so after a grueling two weeks of switching over rear Dana 44, long arm, skid plates, front axel, bumpers, etc. I was ready to go drive it for the first time and she busts right off. And I take off. Within 10 minutes of warm up and 5 minutes of driving around my property in gear it starts reving up and lunging forward. Foot off the gas just letting it idle and started doing the same thing. I put my foot in the throttle and it clears up. If I let it do itâ€™s thing it will die out.
Now, the only thing I did to it that would even remotely be a reason is I removed my Catalytic converter and rear O2 sensor.
I DID NOT so this to be some cool guy screw the world type. I literally removed them so I could get my skid plates up there and be able to install my long arm brackets and what not. So please I donâ€™t want to hear that itâ€™s Illegal or whatever. I get it trust me.
So since the first drive I figured I should at least go buy an O2 sensor and new bung Weld it in and hook it all up.
So I did that. I disconnected the battery to try and reset everything. Started her up drove it around and bam same thing. Ran great for a short time and then high reving idle and lunging and cutting out if my foot wasnâ€™t on the throttle.
What could this be. Donâ€™t tell me the way itâ€™s running is not because the CAT has been removed. Because that doesnâ€™t make sense to me at all. Again the Jeep was running great previously. I would have drove it anywhere. It was strong.