ok i got a 91 hatch with a 93 ls swap car is throwing iacv but has no idle problems at all it happens if im in nuetral and rev anywhere from 1000rpm to 3000rpm it will stutter a little not misfire but just go up and down. i recently converted to obd1 and changed iacv and it still does it

 

halp

 

hjmgfbdv

 

no need to bump your thread every 10 minutes, have some patience.

you could have gotten another dirty IACV, it could be a vacuum leak, or the FITV.

look through the FAQS at the top of the page for a thread called "how to fix your idling woes"
good luck