The ICV can cause the issues you describe. It can also cause issues whilst driving at low revs/rolling in gear and stalling. They are all old and on the verge of dying these days so might as well invest in a new one, or at the very least clean yours and plug it back in and see if that helps.
This post is an artistic work of fiction and falsehood. Only a fool would take anything posted above as fact.
62k Diablo Phase 1 Gti-6: Project Thread
62k Diablo Phase 1 Gti-6: Project Thread