In Ecuador, 56% of those polled on August 30th said they would vote "yes" in the 28th September vote.
As this chart shows, support has been steadily growing for "yes", from 50% to 53% and now 56% in the last three surveys by SP Opinión & Estudios. The poll has a margin of error of +/-4%. Note that this does not yet include the bump Studmuffin's Yes vote will get from this week's decision from CONAIE to support the new constitution.