I don't mean to resurrect an older thread (and it wouldn't have been so old if I had had a chance to do this work on my car a couple years ago), but I'm seeing conflicting specs for those 12582219 injectors

Injector-Rehab has them listed as 25lb, but they're listed as 21lb here;
https://www.injectorplanet.com/produ...otors-12582219

I know you've had measured success with them, so perhaps Injectorplanet has incorrect info?
Either way, I've got four en route for my 2.2 2006 that I'm planning to throw in soon and hope for the best
I really appreciate the investigation, I'm on board for this kind of stuff.

Car's in the shop right now for what I thought would be a front wheel bearing, but might actually be the diff in the transmission... at which point I may cut my losses and just have to get a new car, considering the other work this thing needs and the work I've already put into it.

 

AC Delco P/N 2172907 or GM P/N 12606110
are what I see listed for a 2.2 2006