hey so today after driving my 1994 GSR for awhile i went to start it up again and it had a really rough idle, dipping down from 1000rpms and then coming back up. I tried driving it and it sounds and feels like its bogging out. if i push the gas in too much it bogs way down and barely accelerates. i have to just barely have my foot on the gas to keep it from doing that. I was thinking it could be my o2 sensor but that seems fine, and if it were the IACV i dont think it would idle at all. The only other things i could think of is that the cold air where it hooks up to the intake manifold is pulled down at a wierd angle so it might not be completely tight around the intake manifold. Otherwise i did take the PCV valve off and put it back on the other day maybe i messed something up there? any ideas? thanks.

 

You might have a vacume leave first try disconecting the iacv and iat sensor and clean em up and connect them back in then check for vac. leaks.