I have a friend with an 04 focus ZTS that has a reving issue.
I've Searched and searched for the issue and have seen from IACV to vac leak to Throttle body sticking.
Trying to narrow it down a bit more because all users with IACV problem say their car will die with a bad IACV, but mine does not, it will constantly high rev, but then the more I drive it, the further and further the RPMs go up to the point where if I don't shut it off, the RPMs will reach redline... Seriously...
Anyone have this issue and are there ways I can check to make sure it's not a vac leak / iacv / sticking throttle before I dive into fixing one?