Stop in for a cup of coffee

A blinking check engine light on any car is not a good sign. Curious why it wont spit out a code.
Im on the 3 set of cats on this car. First set went to certify another mustang at the dealer my brother worked at. Second set all that was left was the housing and a little of the ceramic dust in one of the mufflers. This set and I am sure the driver side one is doing the same.
I am trying to get something else up and reliable so I'm not stuck. Replaced intake last time I was home.

Car hasnt been the same after the electric fan went out for the second time a little over a year ago. Blew both head gaskets so it has totally redone heads gaskets intake egr tubes shocks struts, gears and bearings (timken) in the rear, about the only think not new is wiring, tranny related stuff, injectors and 7 coils.