In late may, my 2001 LS 430 thermostat went bad on highway. I was able to drive the remaining 50 miles at a lower speed and the temperature stayed low enough to get home. Changed thermostat; however, after this, I noticed "missing" in takeoff acceleration. Sure enough, "too lean" codes started appearing soon thereafter. I read several of the threads and cleaned the MAC, changed spark plugs, air filter, PCV, and multiple injector cleaners. Any ideas on where to go from here? I was thinking of going and buying a can of seafoam and letting it get "sucked" into the PCV valve to act as a smoke test to look for a vacuum leak, but I think I am grasping at straws at this point. Thanks in advance.