Question about 1997 Jeep Wrangler

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97 jeep wrangler 2.5 running lean

Hey guys I have a customer with a 97 jeep wrangler 165k miles 2.5 it will start bucking and is using more gas than usual. setting a lean code I have replaced injector o rings as they were source of vacuum leak. also replaced tps and map sensor will run fine until hit open road and starts acting up and engine light comes on always a lean code. I cannot find any vacuum leaks
any ideas??

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  • TripleTauto
    TripleTauto Sep 25, 2008

    THANKS FOR THE HELP ALL THIS WAS ALREADY CHECKED.

    ended up being a bad o2 sensor

  • frustaci23 Oct 15, 2008

    ive been having the same problem, replaced the exhaust manifold and both 02 sensors... running a little better but still has lagging performance and gas issues. high idle when cold, slightly rough running when hot

  • dkking1 Apr 19, 2009

    my 97 wrangler is giving me the running lean code and i found a exhauset leak right after the head and expected that to fix it and it did until the car warmed up then it started bucking and loss of power issues not to mentions it seems to be getting bad gas mileage. i am not sure what to do

  • jays jeep Apr 22, 2009

    Hey Guys ,my friend has a 94 Cherokee country 4.0l with the 5 spd.It has failed the emissions test twice having a very high 'NOx' reading.Everything else is great and well below what is needed.The O2 sensors were replaced,new cat and exhaust.Map sensor is new,idle control sensor,throtle postion sensor.New fuel filter,plugs cap and rotor...Honestly we are scratching our heads here trying to find the problem.Oh before you say it,there are no vaccuum leaks either.
    Can anyone help please?

  • Anonymous Mar 13, 2014

    97 jeep wrangler 2.5 engine light stays on

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Check fuel pressure and check exhaust for leaks. exhaust leaks caqn play with the o2 sensor readings

Posted on Sep 25, 2008

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