I recently swapped turbos with a ftg ko4.it is untuned at the moment.my issues is when i cold start my car doesn't idle up like it should.it just sits at normal idle amd struggles to do so until warmed up a little.then when im driving it feels like very sluggish until i hit about 3k rmp then takes off like a rocket.no cel or other funny smells or sounds.no boost leaks.plugs look great but o2 sensors are white as snow.
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