I have three 300's I take car of.. I own one of them.. As part of the routine Maintenance, I change Iffy plugs and eliminate the PTU Sub Harness.. It just gives you a good starting point.. Then get Conzult and a Conzult Cable so you can do ECU/Sensor checks.. Being able to turn off one cylinder at a time, you can see which one is not running.. and you can do it from the Keyboard.. Cj
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