I bought my Renegade on Saturday and on Monday night driving to work I lost all RPMs and when you hit the gas pedal nothing happened. The check engine light came on and coasted to the side and put it in park; after restarting it I was able to make it to work. I took it to the dealership and they had it all day tuesday and called to tell me nothing was wrong with the car so I could pick it up. On my way home from the dealership it did it again. Anyone know what might be causing this because they seem to think my car is just fine? It only has 100 miles on it.