Last week after leaving walmart i went to start car and it wouldnt! A guy checked it out put in a new thermostat and temp sensor on, car started! Sunday morn he put a new motor mount and O2 sensor on my car. Went to drive off, it drove maybe 2 feet and cut off. Temp gauge started back going straight to hot. It was on E, put gas in it and temp gauge still going straight to hot and wont start?!?!?!?