So I just installed JB4 on my car a week or so ago, and left it on map 0. This is because I already had an Open Flash Tablet tune that I needed to get rid of. That didn't turn out too well, because now my engine is acting EVERY TYPE OF CRAZY. It's severely misfiring, the powerband is super jerky, and the turbos aren't working. I already replaced my spark plugs and coilpacks, but that hardly made a difference. What's the problem?
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