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Ken Cherry Posted on Oct 04, 2017
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Why Jeep Grand Cherokee have Poor Idle or Stall in Wet Weather?

After about an hour of driving in wet weather, the Jeep will idle or stall when coming to a start. The idle will drop below 500 RPM and either catch itself or stall. The Jeep starts immediately back-up. Have completed all major tune-ups to date including new spark plugs, all fluids changed, carbon build-up removed, and latest downloads installed. Help??

1 Answer

Tony Curto

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  • Expert 246 Answers
  • Posted on Oct 04, 2017
Tony Curto
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Joined: Nov 30, 2016
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Check evap system for leaks

5 Related Answers

Anonymous

  • 4 Answers
  • Posted on Nov 27, 2008

SOURCE: HIGH IDLE

check for deposits in the airhorn at the breather end

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Anonymous

  • 5158 Answers
  • Posted on Jan 21, 2009

SOURCE: 95 jeep grand cherokee, hard starting, backfires, when cold

get a couple bottles of gas line antifreeze .. if you don't already use it and add it to the gas.

Robert

P.S. in minus 40 i don't even get out of bed... minus 23 here last nite... isn't winter grand

Anonymous

  • 6982 Answers
  • Posted on Feb 18, 2009

SOURCE: jeep wrangler stalls out

check idle air control, tps & map sensor. As usual with electronics, test test test before buying anything/

Anonymous

  • 1851 Answers
  • Posted on Dec 26, 2009

SOURCE: my jeep grand cherokee started overheating at idle

try the water pump - first - make sure the radiator is really full - take the cap off cold and fill - if it looks full - start and run 8 minutes or so - then fill it up - look at ur fan belt - is it tight - tight is about how much pressure u use to make a firm hand shake with little movement - any movement over about an inch is loose - when the jeep warms up the belt can slip and not even make a noise - - new materials don't always squeal. - then be sure ur water pump is ok - they go slowing - the fins wear down - one more thing is the radiator - u don't say how many miles or what maintenance schedules you have or not so that's it for now

Anonymous

  • 1 Answer
  • Posted on Mar 31, 2010

SOURCE: location of ignition module on a 96 jeep grand

96 Jeep Grand Cherokee wont start.Has fuel Press No spark.Poss Ignition Module?Cant Find location.

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Related Questions:

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Why would the motor stall when put in gear motor has been rebuilt and has new plugs

Check your throttle body on the intake for carbon buildup. Open the hose to the intake inlet and check that plate that moves when you depress the gas pedal (while not running). Clean debris with damp washcloth, not soaking wet. If a lot of debris the idle air control valve, and chamber will need cleaned.
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Hesitates to start and stalls out when cold. idle3s very low and acts like it wants to stall when it idles in drive

tune up plugs wires fuel filter could be a idle air control valve throttle position sensor is the check engine light comeing on to no for sure have the vehicle tested by a trusted mechanic
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It could be tons of different things , but being that the problem is more evident during cold weather , I'm inclined to think that the serpentine belt is loose.
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check your transmission fluid,the motor will stall when fluid is low
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