When I accelerate from a stop, the engine chokes down and takes about 10 seconds to finally rap up and go. Have checked for vacuum leaks, no luck. Appears to be heat related as the warmer the engine/transmission are, the longer it takes to move from a dead stop. Have replaced the Idle Air Control Valve, cleaned the MAS and checked the Throttle Sensor. It's either not getting enough air or gas or a combination of both. Any ideas?