Engine Trouble. Would love some help. AOS?

[thstone]

Step #1 - Read the codes and post them up!

I'm not sure about AOS because usually an AOS failure looks like a 007 smoke screen and you didn't report that.

[EJ_2001_986_S]

Took the car to Autozone and had them read the codes. I know it's not a Porsche scanner, but here's what was there.

PO300 - Random Misfire Detected
PO303 - Cylinder 3 misfire condition
PO305 - Cylinder 5 misfire condition

They cleared the codes and I drove the 5 miles back home without the CEL coming back, but it still sounds like it's misfiring with the engine at idle. I avoided coasting and kept the revs up when stopped. I'll do some more searching to see what's already been posted on these 3 codes, but please chime in if you can help.