A CNG kit does not work "plug-and-play" out of the box. The vehicle's original petrol ECU manages the petrol injectors. When you switch to CNG, the CNG ECU intercepts these signals and translates them for the gas injectors.
: A modern calibration tool developed directly by Tomasetto Achille, SIGAS features an innovative approach to tuning both LPG and natural gas supply systems. tomasetto sequential cng kit software download