2000 sunfire 267k miles runs pretty good for that many miles but semi rough idle at light and in park. Cleaned air intake and used gumout gas treatment. Cant get to iacv to clean or replace. Any ideas how to fix rough idle? Thanks

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amazed that thing is still running. But if it's an automatic,, live with it if it idles fine when in N. Just put it in N if that fixes it rather than rebuild it.