Question about 1994 Jeep Grand Cherokee

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Rough idle driving code 27,and 55 hesitate,loss off power lot of virabation,

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Code 27 is a fuel injector problem. The best way to check them is to start the jeep and take the injector wires off the injectors on at a time. If you pull the wires off the injector while its running it should make it run worse. if it does put the wires back on that one is not the problem then move onto the next. If you get one or two that don't make the engine run worse when you pull the wires off that is the one that is bad. Should only be one. oh and code 55 just means end of codes so don't worry about that one.

Posted on Nov 11, 2010

  • walter lema Dec 27, 2010

    very useful! thanks. One qst. though. where could be the problem actually located? On the injector, on the cable, on de computer, ...., Should I replace or repair the bad injector, or something else? Romsram... Your soon response will be very appreciated!!!
    Thanks a lot.
    Walter
    wlema@smandes.com.ar

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