[8D]My GT is stock , but the 6 heat range should be right on the money. If you look at your plugs and they are clean and white they are too hot! The stock turbo should run plugs at least 2 heat ranges cooler than a n/a PT or engine damage could result.I had the stock champions come apart that is the ceramic chipped. The dealer replaced them twice along with plug wires with in the first 7,500 miles.Also check for carbon tracing above the 5/8 hex going up the insulator ceramic.That will indicate leakage and high voltage will eventually travel down to ground causing missfiring.The proper heat range is very important and don't let anyone tell you otherwise.It's too bad Chrysler didn't help us on this problem, the mechanics would just throw a set of plugs in and not report the full extent of the problems.I was pissed off and made a report to DC and never heard any more from them.If reports are not initiated by the dealers nothing will happen. In the future there will be engines replaced due to this oversight and I wonder who will take the blame.I saved the stock plugs that were chipped just in case and informed the service manager.
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