So heres our problem he bought the car (2000 Si) with a messed up head gasket guy he bought it from said head gasket was on wrong and it was i dont know how..... but anyways we got everything put together and it wont start? car turns over, theres air, spark, fuel, and its timed right. my last thought was the main relay dont know if that would cause it not to run though. thing i notice was that it turned over really slow. any ideas? thanks.