You can not use a 850 side feed injector program safely on a engine that has top feed injectors that are a similar size. The idle being off is a warning that the tune is not correct for your injectors. Almost all Different style and brand injectors of similar size require different tuning. Since you went side feed, very few chip programs are available for those injectors that are actual tunes on a engine for that injector. If your going to use a different injector than what is traditional, your going to need a custom tune. At a minimum you would NEED a wide band in the car to at least know your chip tune is safe before introducing boost.
