Question about 1998 Jeep Wrangler

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Will suddenly start to backfire and sputter, dying down but not stalling out. If immediately turned off and on it clears up and runs okay again.

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  • Emseamotorsp Sep 12, 2008

    I am having the same problem. Happened one time on a 5000 mile round trip. Has to be fuel related, stomp on the gas when this starts and engine dies and surges to only about 400-700 rpm. Transmission seems to hunt or cant find the right gear at this point. throw it in neutral at 60 mph and turn the engine off while coasting at 60, restart and away you go , no problem. till the next time. Any answers out there, going to throw my computer on it when I have time and find out wtf !!!!!!!!! Let me know your problem,



4 Answers

It happened to me on my 98 4.0 sport, had to change the cat and both o2 sensor, didn't do it since... good luck....

Posted on Sep 14, 2008

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This was an intermitent problem on my 2001 Grand Cherokee, as stated before I had repllaced bot spped sensors in the tranny. About a 10 minute job for both, vehicle ran fine for about 4 months then started with the hunting for a gear , would bog right down when you floorred it and damn near quit!!!!!!. Put my computer on it again, and low and behold had a bad input speed sensor. Sooooo, I changed the crank sensor, which is part of the speed sensor system, brain, and it has been flawless every since. I am a very experienced mechanic, and replacing this took about 3 hours , as the old one was just about rusted in place, even thought its plastic!!!!!!!! Remove the starter completely before trying to get it out, took several doses of kroil to get it to move, eventooully got it out with a mini prybar and 10 in vise grips. This should save someone a lot of trouble. Eliminated the up/down shift, harsh downshifts, the xtra little kick in the *** on the upshift, bucking stalling and bogging out when trying to pass. Thank god, I finally got it fixed. !!!!!!!!!!!!!!!!!! Time for a beer now.!!!!!!!!! Mikey from EmseaMotorsports

Posted on Aug 06, 2009


Ok, this problem was on a 2001 jeep grand cherokee.Finally had time to scan it, got a code that said the input speed center alfunction. So, I replaced both speed sensors $28.50 each my cost 36.75each retail. 15 minutes to change both senors, problem now gone!!!!!!!!!!!!!! Hope that helps others with this problem. Mikey at EmseaMotorsports.

Posted on Sep 18, 2008

Had same problem, changed both CO2 sensors and it has corrected the problem.

Posted on Sep 14, 2008

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