If you are using a good quality HHO kit on any modern car or truck with electronic controls (from 1989 to the present), you will need an electronic tuner chip like our Advanced EFIE tuners (for gas/petrol) and our Diesel Tuners (for ALL diesels). If you are an advanced tuner and love to tweak sensors for maximum results, check out the Pro Series Tuners below. If unsure which one you need for your On Demand hydrogen system- contact us for help.