My car overheated, we changed the thermostat. And the water pump after putting everything back. It wouldn't stay cranked the R. P. M's were all over the place. It was throwing several codes. We replaced the VVT solenoid reset the codes, it ran fine for 30 minutes. Then it started doing it again after we checked the codes, it said that the crankshaft position was over retarded, so I replaced all of the camshaft sensors and it's still not running rot, it's still. Missing and the check engine light and now i'm getting four new codeson please help