im pretty sure its hop, can feel the car bouncing around.. but then i dont know what the flywheel would sound/feel like to compare.
They knew it has REVO map and if they took the battery out they know/or should have known it would reset and so they should have put it back, so that in itself upsets me, say i didnt have a select switch, i may NEVER have known and thought the car had other issues... not acceptable really