TY posted by BannonZ on April 01, 2015 at 09:52 AM
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Coolant temp sensor is ~$24 and super easy to change, so I'd change that as well. This can also cause odd problems, including start-up. PTU can give serious issues in terms of producing spark, so focus there as well. You might want to check with other guys who are upping the boost (I'm still stock boost level) regarding which plugs/gap to use. Just make sure yours are NGK's, either way.