yesterday i go to start my car. when i start it, it revs to 1.5k like normal, but it starts shaking. almost like it is choking out. any thoughts to what it could be?

it runs fine now.

 

Not sure what it is but I had the same problem yesterday morning, later on that day I went to start my car and there was no power. turns out my battery terminals were oxidised. Not sure if the problems were linked or not.