Im not real knowledgeable on the late-model stuff, so hopefully somebody else will chime in also. When I first started reading, I too was thinking fuel related. Perhaps not enough fuel pressure. Is the clicking only under heavy load, or does it do it in certain RPM's? My thought it that it could be detonating, since it would be starving for fuel. Do you still have your O2 sensors? Without those your computer would probably go into a limp-home mode, causing crappy performance. I read in another thread that Auto Zone will pull your codes for free, so that would probably be a good start. Once you get the codes you can post them up here, the efi guys know whats going on with those. Again, im not the most knowledgable on the late model efi stuff, I own a 65
