Question about 1997 Jeep Wrangler

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Jerking accelerating all new sensors, plugs and wires, also a new computer have already been replaced.

Posted by Anonymous on

  • wrang97 Jun 12, 2015

    Found out my problem was 2 fold. Bad oxygen sensor (exh. manifold) causing problem after 20-30 min cool down. And also under certain driving conditions was getting bucking and backfiring due to battery sliding into computer wiring harness disrupting sensor input/output signals. I placed a 1" spacer on rear clamp to push battery forward and cured my problem.



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Similar problems: After 20min cool down jeep was bucking/lurching that I traced to bad o2 sensor in exhaust manifold (which you've replaced is seems). The second problem of bucking/lurching, backfiring under certain driving conditions I traced to the battery sliding into the computer wiring harness, disrupting sensor input / output signals. I cured this problem by placing a 1" spacer on rear battery clamp, pushing the battery forward. Been years and no return of problem.

Posted on Jul 01, 2015


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Posted on Jan 02, 2017


johnny mcneely

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SOURCE: runs terrible, p1391 is the

since you've replaced all the expensive components 1st.i suggest you look towards clogged fuel injectors next.try some sea foam,add it to your fuel tank to clean the fuel injectors.your computer tells the injectors and the crank sensor tells them when to pulse. you may only have partially clogged fuel injectors or water in the fuel.the seafoam will dry up any moisture in your fuel tank and also unclog fuel injectors. lucas fuel injector cleaner is what i usually recommend,but your issue call for extreme cleaning. try the seafoam,it costs $7.99 per bottle and treats 25 gallons of fuel.follow the instructions on the bottle.but if you suspect alot of water in the fuel tank,i suggest clear rubbing alcohol !/2 bottle to your fuel tank will not hurt the engine,but will remove excess water from the gas tank. thank you,for choosing!

Posted on Apr 14, 2011

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