According to Ford's TSB on moosing, it has no negative affect to the engine...
What I wonder about this problem is if it is not fully the IAC valve/hose to blame, but maybe programming in the ECM in combination with the mechanical parts??... especially since some of those who install updated parts to fix it seem to still end up with the problem. For those who still have moosing after installing the updated valve, did any or all of you also reset the ECM, or just install the parts and drive the car? I'm sure most reset the ECM when upgrading the valve, but could it be a factor?
