Rpms rapidly increase at startup

I still had the vacuum hooked up to the secondaries...unplugged those and all good.
So the other day I checked to see what springs were in there. (Car is new to me). Plain springs.
I must have put them back in wrong cuz this wasnt happening before.
Theres only one way for them to go in, cant see how I could have messed that up...lol.
At 900 pm, when my car is screaming at 4k rpm in my garage and my neighbors start calling, I admit I felt some anxiety.