Hello ladies and gentlemen,

Once upon a time, on a sunny Saturday morning I went to change my spark plugs. Nothing out of the ordinary until cylinder 6 came along and just made my day...the spark plug BROKE IN HALF (that's what I get for being lazy and letting random mechanics handle my maintenance from time to time). I guess it's was over tightened which was what caused it to break maybe?

Not important, so I got the broken half out with an extractor and used a shop vac to "clean" all the porcelain from inside the heads.
So, I go to turn on the car and it stalls then the second attempt and it turns right on BUT now it cranks for about 3-4 seconds then finally turns over with a bit of a struggle.
It does turn over without fail every time but the crank time....

Sooooo....what did I mess up? Help please

 

My 1st instinct is to ask what changed. Did it run well before, Did it sit for ages, Did you gap-check your plugs and reconnect coil-packs correctly? Did you possibly remove an intake or vacuum hose during the process and not reinstall correctly?
Go back to the engine and go through the exact steps you remember doing. You are missing a step somewhere, small amounts of broken glass in 1 cylinder is not a game-changer.
GL!