EGR valve, EGR modulator

[JPERL]

Carb compliance came long after the Van was out of production. so I don't believe CARB applies here

[AD2101]

Carb compliance came long after the Van was out of production. so I don't believe CARB applies here

Ok, maybe I didn't use the right term exactly, but there was most certainly distinctions made between CA and non-CA vehicles, even back in the 80's. Here is a picture of the emissions label sticker on my '86 2wd:



This van has the EGR PN 25620-73010 on it (as denoted by a rectangular blue sticker on the side​ of the EGR valve). This is the emissions label sticker on my '88 4x4:



Which specifically emphasizes that it conforms to California regulations. It's also labeled as a "4Y-E CAL 4WD." The EGR PN on this one is 25620-73070 (as denoted by a round yellow/green sticker on top of the EGR valve).

What that means for compatibility, . I still can't determine if the difference in part numbers is due to 4wd vs 2wd, California vs non-California, or some other reason. If some other members here were willing to pop open their hoods and take a quick peek at the emissions label as well as the PN on their EGR valves (easy to find without removing any parts), we could probably solve this mystery in short order.