Uniberp's answer is the most likely.
Couple of other things to ponder just in case, even though its probably stating the bleeding obvious.
Cold start injectors can leak (rare though this is) whether or not there is current going to them. Mechanical failure. Had a 164E which did it and it just flooded the engine.
Check for leaks in the vacuum hose for the map sensor.
Any chance you got a load of dud fuel? That happened to the 164 too. Area of the intake manifold under the throttle butterfly was awash. Had to poke a rag down there to soak the worst of it up. Dumped the fuel. Refilled with 'good' stuff. After the gnat's pee it had in the system eventually cleared it ran fine. Note: the rag soaked in the dud fuel lay on the shed floor overnight. It was still soaking wet the next day. That ain't petrol.