This verb phrase is a little difficult, as the basic phrase vera fyrir ("be in the way") can split up throughout the sentence, e.g example er ég fyrir þér? (am I in your way?).
Saying er ég þér fyrir (am I [to] you in the way) meaning "am I in your way" can be said, though it sounds archaic.
See also
fyrirferðarmikillm, fyrirferðarmikil f, fyrirferðarmikið n