Kendo, I would pay attention to the trouble code. It really sounds like there is something wrong with the wastegate actuator solenoid. The stage 1 tune calls for a very aggressive wastegate duty cycle. It sounds like for some reason the wastegate is getting stuck closed. It is one of those problems that is caught between map related and hardware related. Your map works on other cars with the same hardware, but is causing a problem on yours. A good professional tune would probably run a lot better, but IMO is a waste on a basically stock vehicle. I would imagine that the problem could go away with a stage 2 setup, but still shouldn't be ignored. How much does a new wastegate solenoid cost? Is your car still under warranty? It probably is voided due to the stage 1 mod, but I don't know if the dealer can tell if it's stage 1 or not. I know, it's not 100% ethical, but I'm just throwing it out there as a possible option.
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2005 Obsidian Black Pearl XT w/4eat
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