which doesn't mean it is the best or most efficient means of tuning. There are better,cheaper, more effecient ways of tuning than try to fool your ecu. Instead of fooling the ecu why not control the ecu directly? For the price of E manage, you almost have a Zemulator. No need for extra harnesses or sensors. Piggy back is still pipggy back. You are still limited within the ecu's programmed code.