I have 2003 4tec gtx sc ltd. This is a new issue im experiencing once i start ski my idle rpms are staying between 2200 and 2500 rpms. hooked up can do and the faults ive been getting are p0353 and p0600 which im not sure if those are old or not but wouldnt think those would cause my idling issues. Anyone who maybe able to give me a little bit of help where i need to begin to troubleshoot sure would be appreciated.