We're continuing a car maintenance with a full-on tuneup! This week we're changing out old spark plugs, checking functional fluids, and hooking in our Android phone with an ELM327 OBDII bluetooth adapter. Coupled with software called Torque, you're well on your way to a heads-up display for your car. play.google.com/store/apps/details?id=org.prowl.torquefree&hl=en www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=elm327