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We have an issue with a Link CANBUS Lambda I feel it is something with data-rate/communication as the Lambda unit needs connecting to battery 12v to make it work , connecting it to a ignition switched live stops the unit outputting any data ( no canbus faults shown in CAN F12) We are also using the same canbus trunk to run a Race Tech Dash and this works all the time and removing this item from the canbus set up does not allow the Lambda unit to work. We are using a Link Lambda unit on a Thunder ECU. car was designed to run a earlier Link ECU (Extreme) before the Thunder was released so we specced the car with a Link Canbus Lambda and not to use the Lambda set up to drive the LSU connected direct to the Thunder. Software sees the CANBUS unit in the CANBUS folder under CAN devices and with the unit connected to the battery we get data from the unit. We are using Firmware 3240 as when we built the map we couldn't get the motor to run using dual fuel maps turned on. We have since not used the dual maps in the tune but it will be needed at a later date ( Simon said there was a bug in the software with the latest firmware that prevent any injector output when dual maps are used as overlay) CAL file is attached Thanks ACORN PS13_V6 ECU BUILT ON THUNDER BASE NEW FIRMWARE_MAP 17 TEMP FINAL playing wth canbus.pclr