Well, this FAQ entry treat more about problem over 4000RPM than before 3500RPM, but I'll check out the PCV valve anyway.

Secondaries open just fine, it just seems to run lean on gas or air on 12 valves. When secondaries kicks on, she runs fine.

'99 T-Red Contour SVT '95 Mystique GS - 2.5L V6 ATX '94 Topaz GS - 3.0L V6 MTX - Gone since Feb. 06 www.tempotopaz.com