Car starts and dies after 5 seconds

Alright so I finally got my 6 bolt swap done. All it needed the other day was a battery so I left it alone for a few days and today I put the new battery in and it starts up just fine. The car runs for like 5 seconds and then just completely dies. I am really clueless as to what this could be. If anyone has any ideas they would be greatly appreciated as usual.

Does it sputter and try to keep running then die or just plain die?

It just strait dies.

Sounds to me like your ECU is picking up something it doesn't like and is shutting the car off...you sure you hooked up everything properly?

Yeah because it was running fine just the other day.

Yeah because it was running fine just the other day.
MAKE SURE YOUR CAM SENSOR IS WORKING PROPERLY!!! LOL!!! I just got done with a big huge thing over my car with the EXACT same problem... it was the cam sensor... no joke take a look at it

Yup...thats what it ended up being. The CEL said cam sensor and so I took it off and took it apart and there was like a ton of sand in there. No wonder it didnt work. Luckily I had another one just chillin in the garage. Hooked it up and it was good to go.