While i was driving going up on a hill and trying to accelerate from 35 to 35, even though i'm pressing the gas pedal, there is no response for 1 minute and then suddenly it will accelerate up to 45 to 50 and it's so scary especially when it starts going faster on the sharp curves and driving up. i had to brake to slow it down but i don't want to be rear ended. this has been happening lately and it's a safety concern for my family.