I have recently had my AU converted to lpg and i am under the understanding that the LPG has its on ECU. I was wondering if someone could help me understand a bit better how the Lpg ECU and the stock ECU work together. Do they work independantly like does the lpg ECU take over when it is runing on gas and vise versa? and if i install a J3 chip onto the ECU will it also change how the car runs on gas?

Sorry If my questions make no sense haha, i have a very limited understanding of this but im trying to piece it all together haha. Thanks