my X keeps stalling

[cesspool]

2000 X, 59 k, 7.3. My X keeps stalling, but it only happens at slow speeds. Like idling or coasting at lights etc. I don't recall how long it has been doing it, but it happens pretty sporadically. It has never acted up, thrown a code or had the slightest hit of trouble restarting. It has a new CPS sensor last year. But I know it never once stalled prior to the change. Any ideas?