I recently rebuilt my motor and put it in a new car for the first time. Everything hooked up correctly but the engine only idles for maybe 10 seconds and then dies as if someone turned off the key.

Following that it now refuses to start at all. Anyone have an idea what the issue could b. It sounds as if the motor is flooded with fuel.

 

Faulty O2 sensor perhaps. Log O2 sensor voltage.

 

check crank trigger wheel make sure is on correct way

 

sounds like a connection problem, or faulty sensor like foxbat said