Just want to know if this is normal. When I switch map from one bank to another and then tried to start the car, I get this rough start with a loud thunk like noise. After that it is all good, until I switch map. I thought the loud noise only occur when I switch map when the car is off, so I tried not to do that. Today I switched map when the car is running, stop at a friend house came out and same rough start with that unfriendly make you want to cringe, cross your finger and pray nothing will blow up noise. I do have version 3 by the way. Any suggestion? Maybe the SMART will clear that up?