Rebuilt a 360 with bigger injectors and cam. After a few mins. of running the check engine light comes on, i have done the trick to pull what code it causing the problem it says map sensor not I have a the cpu reprogrammed by B&G performance just curious if their is a upgrade version of the map sensor or is their something else?

 

Map sensors are fairly simple, and rarely fail. I would check wiring first, and connections at the PCM. If all that checks out, just grab one from the parts store, or dealer.