jus got an LS swap on my hatchback a month ago, motors been running good but about last week it started acting weird...i would start it and it would shut off like 2 seconds later...it would do this about 3 times, and then itlll finally stay idling...does anyone know whats wrong???

 

Is the Check Engine Light ON?

Clogged fuel filter?

Faulty distributor -- coil or igniter?

 

the check engine light is on, but thats because when i got tha swap they ran straight pipe and took out the cat...the guy that did the swap said that its prollie cuz i need to get that chip and put it in the computer...its not tuned...is that why it could be running like that??