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.
03-23-2012 06:38 PM
How old are the Wires ?
03-23-2012 06:48 PM
No Wires, It's got that big coil pack with the boots attached to it.
03-23-2012 06:52 PM
That happened to me awhile back and I replaced the coil pack. This took care of the misfire code.