NOTE!!! CAUTION!!!! WARNING!!!!

It sounds like you are lucky. Whenever removing and replacing the shut off valve you should ALWAYS draw a vacuum on the valve and ENSURE that the Stop lever moves upon actuating the diaphragm. If it does not move, DO NOT START THE ENGINE. The engine will run away to top RPM with no way to kill it.

Been there, done that and spoiled a freshly rebuilt engine.

The only way to kill it is to listen the injector lines. You have less than a minute to get this done before the engine is damaged, or possibly destroyed.

Keep a 17 MM open end wrench in your hand whenever starting an engine after such IP work.

As Rick said, you have a leak somewhere else. The most common thing is for one of the vacuum lines to get knocked loose when changing the oil filter.

Merry Christmas,