08 GT. 121000 miles. When starting up from cold, the idle searches high/low. When initially taking off to drive, the engine bogs down, unless you get on it. Once its warmed up, that sympton is gone until the next morning/cold start. No codes and could not locate any vacuum leaks. Throttle body removed, cleaned and gasket replaced. New fuel filter.

 

Stock tune? CAI?

Clean the MAF next and run a tank or 2 of SeaFoam. 121k miles is a lot for an '08 and hopefully it was mostly highway. Any other maintenance records? Last time plugs were replaced? Sounds like a (whichever-loop-mode-its-in-when-cold; can never keep them straight) loop issue.