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Old 03-26-2013, 10:19 AM   #2
Loyale93
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Member#: 91347
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Shermer, Illinois
Vehicle:
'13 XV Crosstrek,12
1050 Triumph Speed Triple

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The roads in Mexico are known to have thinner air that will affect your stage 4 tune and Monster Tajima sized turbo charger.

Give us a list of mods, location (if for no other reason to factor in weather), so we can better help you out. It sounds like you're getting some after fire in/around the rear O2, which is then causing the engine to pull timing? Maybe?
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