The barometric pressure sensor should be located in calm air where it is not much hotter than ambient air. It is sensitive to fast moving air (lower pressure in fast air and lower in hot air than cold). It is located in the airbox as this met the above requirements, but only so long as there is air moving through the airbox. Remove the stock ducting and turn the box into storage and the air temperature in the box goes way up. I relocated mine. Adjacent to the TB inlets and insulated from engine heat works to keep it away from engine heat and in slowly moving air.