Question about 1998 Jeep Cherokee

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2003 Jeep Grand Cherokee Runs Rough

I have a 2003 jeep grand cherokee 4.0. At first when i would start it, it would idle really rough but after giving it a little gas it would stop. Now it runs rough while im drivng. it has a hard time going over 30 and there is popping sound coming from underneath. Does anyone know what the probelm might be?

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I had a simalar issue,replaced lower O2 senser and cured it.

Posted on May 20, 2009

  • tommycj777 May 20, 2009

    Correction! Its not called lower 02 senser.It is called the upstream 02 senser.

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It sounds like a few different things or a combination of more than one.

  1. The EGR valve
  2. The catalytic converter
  3. The mass airflow sensor

Posted on May 09, 2009

  • Randy Hough
    Randy Hough May 11, 2009

    Have you had the timing checked and or adjusted,It sounds like it's back firing.

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1 Answer

2003 jeep grand cherokee with idle issues


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Cleaned the Air Mass Flow Sensor?

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