check engine light on, problems starting now?

[hotmilk400]

okay. as everyone might know, i was having random check engine problems. i had a few differnt codes come up, nothing point at jsut one thing. sometimes the check engine light will just turn off while i am driving, and it might not turn on for another 40 - 80 miles. anyway, i just started having problems starting my car. it doesnt always do it, but yesterday, when i was trying to start it, it made a funny sound.

now, i have a new battery, and it didnt sound electrical related anyway.
i also have a manual car.

when i turn the key, it kind of sounds like its humming. maybe the pistons are moving, but its like its not getting fuel or something. i dont know, i never heard it before. i can normally get it to start if i keep trying to start it..

it doenst give me any problems while im driving it, but it just started to give me problems starting.. any ideas what it is??