We don't know what car you're referring to? And why the hell are you cutting wires without knowing what you're doing or about the vehicle? Stop creating more issues than you had.
Try a new IACV, cleaning it. Try going to a parts store and using the CEL scanner to see what the Coolant Temp is and how it changes with load. If you don't have the emissions purge solenoid plumbed and a tune for it, this will cause issues similar, so will fueling issues.
Again if you don't know what you're doing, get a diag done at Subaru!