Major League Soccer champions City, three-1 up from the house leg closing week, looked to be cruising into the ultimate 4 after Taty Castellanos fired them right into a 1-0 lead with a crucial away purpose from a loose-kick on 31 minutes.
Andres Lezcano were given Comunicaciones lower back on stage phrases simply before the interval, but Talles Magno restored City's advantage to guide 2-1, five-2 on mixture.
But Comunicaciones got here roaring back in a frenetic overdue rally at Guatemala City's National Stadium.
Nicolas Samayoa bundled in from close range on 69 minutes to make it 2-2, after which three minutes later Lynner Garcia tapped in to position the Guatemalans three-2 ahead at the night time.
Jose Contreras then drove in an extended-variety thunderbolt within the 88th minute to make it 5-5 on mixture, but City held corporation in a frantic very last couple of minutes to increase to the closing 4.
New York will face both MLS competitors the Seattle Sounders or Club Leon of Mexico within the semi-finals. Seattle, 3-zero winners of their first leg last week, tackle Leon on Wednesday.
New York spearhead a quartet of MLS groups inside the last eight of the match, the gold standard membership competition for aspects from Central America, North America and the Caribbean (CONCACAF).
No crew from Major League Soccer has won the CONCACAF identify due to the fact that Los Angeles Galaxy lifted the crown in 2000.
