IA5 - Resonance Chamber Condition
^ Visually check resonance chamber(s) for a pinched hose connection, or for cracks that allow unfiltered air and moisture to enter the system.
^ Check resonance chamber(s) for other damage.
^ Is the resonance chamber(s) free of damage or poor connections?
YES -- Go to IA7. IA7 - Throttle Linkage
NO -- Service or Replace the resonance chamber(s).