Ok so today I finished installing a new cylinder head. When I was setting the distributor timing everything was going good and the car was idling smooth. When I removed the pin from plug used to keep the ecu from making corrections to timing when setting the distributor and walked back to the front of the car it just shut off like someone turned the key off. I tried putting a new main relay in and checked the fuses but that didn't work and the car just turns over now without cranking. Obd port is also now not giving a signal to my scan tool. What could be the issue. Thanks in advance. Where i had the clip to keep ecu from making adjustments when setting the distributor

 

if it ran fine then your timing is fine.
why the pin though?
will it run again if you put the pin back in?
same head? correct ecu?

 

the pin was in the manual for setting the distributor as part of the procedure. It turned out it just blew a fuse