hey guys. i actually dont own a scion but my friend does. we go to penn state thats wwhy im posting in this section. she has an 06 xA 3.0 and i have an s2000 and know a good amount about cars.

her cel came on last week and the codes were P0505 and P0511. i forget what it actually said on the reader, but i can get that if needed. when i cold start her car it will die out and not hold idle. i have beenn fixing this by reving it a little to warm it up.

also when i accelerAte it sounds like a rattling in the exhaust. anyone know how i can fix this idling problem or point me to the right section todo so. also car is stick

thanks