so I just got my ARD blue tune in the mail after having my motor built by RSI and did a 19t upgrade..While doing the learn in procedure I got a misfire on cyl. 1 and 3 and check engine light. Looks like RSI used Bosch plugs which I've had problems with before. I'm going to the Volvo dealer today to get some OEM's and I hope this sorts it out..Anyone else have issues using Bosch FR7DC plugs..Looks like I paid $2.29 each for them...Maybe I will use them for fishing weights if new OEM plugs fixes this issue...Seems like more you get into this tuning/performance crap the more problems you have..I will be glad when I can get my 850R running proper!
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