Well, after forever of trying to get that tick under control and dealing with it running rich on both banks, it's back, he's had it, I've totally just been avoiding the forum lately.

When I sent it, it had 300-500 miles on it with only two stored codes, none thrown. When he got it, it threw CEL for 4 codes. After re-adjusting the air box , there's only 1, and it's a weird one. EGR, but we think we got it sorted. What's weird about it is that the EGR is his old unit. He tried new gaskets but found the MAP was slightly unplugged and told me it hadn't come on since, so maybe. I guess I'll found out when I get a text lol.