Car Cuts out immediately after starting up

[HOFSGNX]

Just got done going through the motor (roller rockers, stroker kit, rotating assembly, etc) and after re-installing the motor it starts right away but then immediately kills. I have the FAST E85 system. Everything worked great before we pulled the motor. Is it something simple that we are missing. Stock security system. Any ideas...thanks for the help!

 

[TurboBuRick]

What chip?

 

[HOFSGNX]

no chip it is the FAST e 85 system

 

[TurboBuRick]

Check the vacuum line to the map sensor.

 

[GNVYUS 1]

I'd start with a boost leak test and go from there, I had a huge EGR leak that did the same thing.