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2 Answers

99 jeep cherokee limited recently it would start but it would die out to keep it running had to keep foot on gas until it keeps running any idea what cause that

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  • _-__-___-_
    _-__-___-_ Jan 03, 2017

    Hi Levy Broussard, I want to help you with your question, but I need more information from you.
    which engine is there.?
    does the CEL lamp glow running, Check engine light.
    did you scan the PCM first. seems not?
    and is first.
    is the engine misfiring, ?????

  • Levy Broussard
    Levy Broussard Jan 04, 2017

    its a 4.0 no its notmisfiring didn't do a pcm scan yet

  • _-__-___-_
    _-__-___-_ Jan 04, 2017

    how many miles on this 4Liter, XJ
    50k, 500k?
    how many miles (years) since, new spark plugs.?(or a real tuneup, filters sparks)
    skip the 60k mile tuneup"?
    run fine after the keep foot on gas, deal>?
    as in. you can drive ok.????
    if yes, does engine, get fully hot. 180f>
    if yes are hot restarts easy ?
    if starts are poor, only ! after long park.
    then it consider in injector leaking.

    and back the the CEL lamp
    is CEL glowing running??
    eaCH key on, CEL glows, it must...
    start engine, CEL goes out, it must if engine
    stays running, does it?

    or you can't ever keep it running,?
    say to drive, if you can drive, does the CEL stay, out,
    if the CEL glows, that mean you must scan it
    to see why its glows. on all cars 96 to now
    USA< same answer.
    As can see all I have are question,due to
    I cant drive it.
    stalls have many causes, over 50 in fact.
    every thing it does correct and wrong
    tells a far better picture,
    something your mech will see in short time.

  • _-__-___-_
    _-__-___-_ Jan 04, 2017

    the only thing I can say is the ASD relay is
    not dropping out, if hot footing works.
    The PCM can drop "ASD" relay for 8 reasons.
    so it's not those.
    those are:
    1: bad spark. (a basic tuneup works most times)
    2: bad fueling, too rich, too lean or flooding, one can example spark plug tips and learn most of this, (100 year methods still work here)
    3: on old engine, bad engine, dead or weak cylinders, lots of causes. huge list.
    compression test finds most.



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  • Jeep Master
  • 48,419 Answers

Indicates that the idle circuit or system is not operating as designed .
could be a sensor fault
best have the fault codes read to find the area of the problem

Posted on Jan 03, 2017

  • Anonymous Jan 03, 2017

    the idle controls can not control idle
    if the engine has gross misfiring,
    called out of its command authority.
    nor did he scan it.


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  • Jeep Master
  • 20,706 Answers

Ever get a full tuneup this decade?
did you.
1: check oil levels.
2: check fuses.
3: hot foot keeps it running eacy? , no misfire can be ISC stuck closed. clean it?
4: hot foot (right) keeps it running but is hard to do, and misfires. it is misfiring, and all ISC's can fail (perfect) with gross misfiring.
Even stuck open EGR cause gross rpm drop and worse misfire... 400 RPM,it can be this...
so back to misfiring, and not idle controls, see?
misfire has 50 causes, need a list? lol
but #1 for 100 years now, is not getting the tuneup.
as stated in the operators guide. see that page,.
the 60k mile tune up is very important , skipping it , you land just where you are now, for 100 years, same deal. on cars ignored.
we cant hear it and if we could , bingo.

why ask the deaf and blind to guess, ?

Posted on Jan 03, 2017


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