Hello all, I'm new here, and I've been having trouble with my '00 v6 mustang (aut0). Engine light came on a few months ago and came up as EGR flow excessive. I changed the valve and erased the code but it would come back on and turn off on its own intermittently. Today I changed out the sensor and I started the car and it worked fine. I shut the engine off and reset the code, and now it won't start at all. It just makes this rapid clicking sound. Any ideas? Thanks!