Ten attempts at getting a jam jar jet to properly run. After experimenting with hole sizes in the lids and the amount of methanol in the jar, I finally got it to a decent working condition. I think it could still be better, but that's for another day. If you want, you can just jump to the successful try at 2:10.
I got my instructions here:
http://mad-science.wonderhowto.com/bl...
More info here:
http://mad-science.wonderhowto.com/co...