1994 Honda Civic Q&A

1994 Honda Civic Question: My 94 Honda civic idles very rough in gear. If I shift to neutral, smooths out?

In gear, it idles very roughly, sometimes it will rev up and down. If I shift into neutral, it will immediately smooth out -
Answer 1
check your Iac valve and for vacuum leaks -
Answer 2
agree with goodguy also ck for misfires -