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My 98 jeep grand cherokee laredo 4.0 idles rough and is jerky while moving at idle speeds it sets no codes and runs great past base idle

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  • 444 Answers

Was it ever tune up?

Posted on Nov 04, 2012

  • 1 more comment 
  • Shawn Mathes
    Shawn Mathes Nov 04, 2012

    yes has had tuneup and throws no codes and no problems above idle

  • Rocky Degelman Nov 04, 2012

    Depending on the miles on it, Were the spark plug wires change,

  • Shawn Mathes
    Shawn Mathes Nov 04, 2012

    yep and it has 132800 miles

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2002 jeep cherokee laredo

the only problem that vehicle has is with cooling fans is relay/module or electrical harness to module that burns up located behind and under right front headlamp assy must remove headlamp to access relay/module that is what powers up fan motor module assy.

Posted on Aug 10, 2008

teezay731
  • 1 Answer

SOURCE: rough idle stalls at low rpm's

check your transmission fluid,the motor will stall when fluid is low

Posted on Mar 24, 2009

  • 43 Answers

SOURCE: Very rough idle on 2002 Jeep Grand Cherokee Limited Edition V8

If you haven't changed the plugs or had the fuel system cleaned, now would be a good time to do it. The number 1 culprit for rough idles is dirty injectors or plugs. You can try an injector cleaner in a can (or bottle) for under $10 and see if it helps, and then work from there. If there isn't any improvement then if you are able to, check the plugs for any gunky buildup and if you find a bad plug, make sure you replace them all (or have them replaced) at the same time.

Posted on Aug 03, 2009

wracefans24
  • 1985 Answers

SOURCE: I have 2004 Jeep Grand Cherokee special Edition

have you checked the IAC, idle air control,or cleaned the throttle body and plate.

Posted on Nov 25, 2009

c17hydro
  • 2984 Answers

SOURCE: 1998 Jeep Grand Cherokee Laredo 4.oL I got a code po113

Trouble Code: P0113 (4.0L L6 VIN S Auto)
IAT Sensor Circuit High Input Print this code dataprint_icon_codes.gif Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details

Trouble Code Conditions:
Check with ignition on or engine running; battery voltage more than 10v; The PCM detected the IAT Sensor input was over 4.90v (exc. Dakota, Durango, Ram) or 4.98v (Dakota, Durango, Ram) for 3 seconds.

Possible Causes:
  • IAT Sensor signal circuit shorted to VREF (5v)
  • IAT Sensor signal circuit is open, or the ground circuit is open
  • IAT Sensor is damaged or it has failed (an internal open circuit)
  • PCM has failed


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Posted on Dec 01, 2009

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1 Answer

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hola como puedo saber cual es el problema con mi 96 grancheerokie cada vez que acelero despues de 1500 rpm el motor pierde fuerza y avienta explociones por el throurolbody ya cambie los sparkplugs,cables, rotor, cap y el motor ya esta a tiempo herreravazquez2006@yahoo.com

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