I have a 2001 Focus ZTS 16V ztech. My problem started a few months ago very intermitently. I would be driving, suddenly RPM would shoot way up, temp gauge drops all the way down and engine lights come on. After RPM stabalize, temp gauge returns to normal and lights go off, maybe lasting 8 seconds. Now its everyday and sometimes i can not even move the car because it idles between 3 and 4 thousand rpm, making it shift very hard trying to put in gear. PCM and mass air flow sensor have been replaced, did not solve issue. I believe it is a wiring issue, just not sure where to start. Any suggestions would be great, thanks.