Ok today i was driving, and all of a sudden all my gauges stopped working . I mean no speedometer all of them. So i try to pull off from the light then all of a sudden the car snatched like i was having transmission problems and i could not go no faster then the car died. I automatically thought alternator got it changed and for some reason now the car will not stay running. I checked all the fuses and they are good the dash does not work still, and the reverse lights dont work either what could this be. I am lost could i need a new ecu?