Thanks for the suggestions, I'll try with a different sensor wire and also new connectors. Just to make sure if you understand the problem, by 'lost power' I mean that there is no boost&turbo (the car is going, the connection betweem the transmitter and receiver is not lost). Also is it normal for a spark to apper every time I connect the battery with the receiver (happens with the 5300 mAh LRP and not with the 5400 CS), is that a sign that connectors should be changed?