bought the car in April, the car went for service throughout its history and we are just the second owner. upon receiving the car we took it for a diagnostic and everything was fine except the Head gasket. So in July we changed all gaskets with thermostat, waterpump belts, seals ect. did not change anything electrical. the car drove like a new one and then we took of the exhaust off becuase the pipe coming from the exhaust manifold was cracked. when we put it back after we welded the pipe back on and tried to start the car, it did not want to turn over and we saw the engine light was totally off(not even coming on with other warning lights upon starting). we checked everything(took off all sensors and cleaned and still same problem.