Originally posted by MrFord:
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.



the secondaries open between 3500 and 4000 rpm depending on type of driving. if the problem is opposite the faq that would lead my to beleive the secondaries are not closing, it has been documented that you loose power if the secondaries stay open all the time, unlike a probe gt where I think the idea came from, anyway check to make sure the secondaries are moving

- 95 Mystique LS - Zetec/5spd - 99 Contour SeVT Sport - Duratec/5spd Official NE-CEG Contour/Mustang Family