Since you adjusted two 617 valve clearances before with no issues. They should still be quick checked for clearances making sure you have the clearances for intake and exhaust valves not confused.. With your previous experience they will probably be okay.

Other than that at the moment it depends on how you feel about coincidence. In the general scheme of things you may have a partially obstructed fuel tank filter, A weak lift pump or open relief valve on the injection pump. Any of these things may contribute to the differance on the can feed. As mentioned before have a look at the fuel in the return line at the pump for excess air.

I actually am having a hard time understanding what you may have disturbed to account for this that other threads have not covered. The most abstract thing I thought about was you introducing new fuel at the time of the repair to the car that was bad. Running on the container did not use the same fuel as was in the tank I suspect. If it was get a little fresh fuel somewhere.

I just re read your original post. It also sounds very much like fuel starvation or air if not the valve clearances. You by the way just have to check the valve clearances not do them again unless the need is indicated.