IA9 - Throttle Valves
CAUTION: Do not remove the thin sealant coating from the throttle bore.
^ Remove the throttle body from the engine.
^ Check that the throttle valve(s) moves smoothly from the fully closed to the fully open position.
^ Check for loose, bent, or damaged valves, and for contamination that can cause binding.
^ Is the throttle valve free from damage, binding, and contamination?
YES -- Go to IA10. IA10 - Shutter Valve Function
NO -- Service or replace the throttle body.