Mr2 transformers

I have had the same problem, I have been over everything, and using another I-color SBC to solve what is wrong. I am fairly sure it’s the small battery inside the hand controller, it’s so the controller doesn’t lose your settings when it’s powered down. It makes sense that Blitz would do this as a safety measure, I just wish they listed it in the manual. Anyway looks like an easy fix two wires, and a very small thin battery, something an electronics store would have. the battery is located on the inside of the rear cover, it’s glued onto the cover, so be careful when you take the cover apart, the two wires are very thin. So you can be sure it’s not the solenoid and it’s not the SBC ecu or a boost leak.