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I have a 2006 4200 trailblazer engine that is turbocharged, Its draw through MAF. The problem I am having is on decel the afr drops well in to the 9s and the motor stumbles and stalls. There appears...

All working on my end thanks for the late night web repairs.

Thanks Keith I was able to purchase credits, but the MPVI2 will not Resync and add the credits they do show in my devices though.

Is anyone else having problems logging on to the HPtunes site? I need to purchase credits.