spark plugs

  1. E

    How Do I test PCM signals to Coil Pack 5/2?

    2011 Jeep Liberty Limited 3.7L 4WD 203,000 miles Code: P0302 misfire on 2 I have done spark plugs, spark plug wires, replaced the coil pack that fires 5 and 2, and made sure it's not a fuel injector or fuel injector wires. It's time to check if this is caused by PCM communication to the coil...
  2. J

    Messed up changing spark plugs...pictures and video inside. Advice wanted..

    Hello all. I was changing my spark plugs on my 06 liberty 3.7 I put loosener spray on the bolts holding the injector in, when I went to loosen the bolt, the head snapped right off. leaving no clearance for me to put anything to hold the injector in, in my inexperienced mind I thought...well...
  3. ron.dittmer

    2006 Liberty 4x4 with 3.7L - Scheduled Maintenance Is Critical

    We own a 2006 Liberty Sport 4x4 with the 3.7L gas engine, now with 87,000 miles. We bought it used in 2009 with 29,000 miles. I have been real good with maintaining the vehicle.....or so I thought. One thing that surprised me about the 3.7L engine is the scheduled frequency the spark plugs...
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