its simple to check remove the passenger side kick panel and see if the cradle has been opened, if there is a gold rivet securing it chances are the seller was telling porkies as its not chipped, normally a chip will make it run smoother giving better fuel economy, well it did on my 4x4 thats for sure or if it has one it may be even loose and simply need a clean and re plugging in as chips are not all about power good ones like superchips are about mapping