i was driving the revo today, and couldn't get it tuned right. it seemed to bog when there was a load on the tires. every time i hit a jump it would bog as soon as it hit the bottom. and i was trying to go through deep snow and it would bog. but it would run fine on the street, with and occasional wheelie when it got traction. the temp was probably around 25-30. what do i need to do to fix this prob.