Mycar will run great until it warms up, then it will hesitate and buck resulting in the rpms going wild and I will have to pull over to let the car cool down. After it cools, the car will run great till it warms up and does this again. My question is, could this be a head gasket going bad? If so would a tablet fix it for the time being? It has new plugs, wires, distributor, etc.