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I always thought you needed to replace the MAP sensor with one capable of reading boost when you went turbo, at least if you aren't planning on running one of those stupid hack systems with an fmu and missing link and such. The chip might read boost, but the stock map only can register a certain amount of positive pressure in the manifold before it goes wtf. Toss that ebay chip in the trash and get a custom tune by someone if you are running a turbo. 'you'll blow yourself to pieces'

. But seriously, ebay chips are crap.You probably want to keep the cel for it's normal use, rather than use it as a shift light too.