The faith that D.Q. and Poncho talk about is very different because D.Q. knows what he means by "faith" while Poncho has no idea what anyone means by "faith":
There it was again, that word. The more he heard it, the less he knew what it meant. (216)
While D.Q. means it mostly in a religious sense as believing that all things work together for good, as the New Testament explains, Poncho hears it (without understanding it) in a humanistic sense as believing in the integrity and trustworthiness of another person: "If you have faith in Johnny, Daniel will come ..." (216).