OK, 4 blinks and then 3 quick blinks. Is that trouble code 43?

Edit: I am assuming it's 43, "Fuel supply system." What could I have done to get this trouble code by installing my header? Anyone else get this code after a header install?

Initially I forgot to use the crush gasket between the header collector and the cat so there was a massive exhaust leak. I assumed that the leak was causing me to run lean and consequently get a CEL. Does this seem feasable or do ya'll reckon it's omething else?

 

Ok, I reset the ECU and it's holding steady (no CEL). How many engine cycles does it take to spit a code back at you?

 

until the mistake repeats itself. if it does it right away, then it will give you the code right away. if not, then it might not be a problem anymore.