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      12-31-2012, 09:15 AM   #11
cn555ic
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If your running high boost and jb4 went into lean run protection, I would work out what's wrong before running it hard again. If your jb tune is going into this failsafe on lean run that would mean your a/f is above 15 or 16 and that's not good at all especially during high boost and high rpms. Running it hard, forget about blown turbos, How about engine replacement because of detonation aka knock.
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