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Old 03-23-2012, 06:35 PM   #1
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'00 TJ 4.0 L Check Engine Light

My '00 4.0 L check engine light was on a week ago, Auto Zone scanned it and it came back with a Throttle Position Sensor problem and a cylinder 1 misfire. Replaced the sensor and put all new spark plugs in. CEL back on again this afternoon, scan shows cylinder 1 misfire again! Do i need to replace the coil pack?? Any other ideas? Thanks.
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Old 03-23-2012, 06:38 PM   #2
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How old are the Wires ?

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Old 03-23-2012, 06:48 PM   #3
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No Wires, It's got that big coil pack with the boots attached to it.
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Old 03-23-2012, 06:52 PM   #4
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That happened to me awhile back and I replaced the coil pack. This took care of the misfire code.
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Old 03-23-2012, 07:05 PM   #5
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Thank you.
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