Question about 2002 Jeep Grand Cherokee

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Jeeps missing under load - 2002 Jeep Grand Cherokee

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Possibilities are: a bad spark plug, bad coil, problem with info going to or from computer or a failed sensor in the engine management system. First have a code scan done and see what info is stored, (most larger parts stores do this free) then check all fuses everywhere (under hood and interior panel, making sure all are good and connection is good on both ends of each. In these systems something as simple as a sensor out of range or a small fuse that has blown can make a huge difference in how the engine runs.
Online diagnosis is nearly impossible due to the fact that the system is complex and even the best of shops can't tell you what is wrong without doing complete testing first.

Posted on May 11, 2010

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