i noticed this started happening about a week ago. i thought maybe it was bad gas but i filled up again and its still there. i pulled the codes today and came up with 565, 314, and 311. i did a search and others suggested that 314 and 311 will come up if you deleted smog. the cannister purge is part of the a/c system right? so the codes do not seem to reflect this issue. the plugs and wires were replaced not to long ago. dizzy, fuel pump and filter were also replaced within the past year. i checked the timing its good. cleand the maf. the car drives and idles fine. it just makes a sputtering noise and slight hesitation when you give it gas and it seems to clear up once it gets to about 2500 rpms. what else could it be? i was thinnking oxygen sensors but wouldnt they show up in a code? any suggestions on what else to check?