'07 Cobalt, 2.2L Ecotec; CA emissions spec (RPO L61)
I inadvertently tried to install a Fed-emissions spec injector in our CA-emissions engine. AFAICT, it would not seat properly in the intake manifold, which also prevented the other injectors from seating. I replaced this with a CA-spec injector, which does fit. So, all is well, mostly.
My question is, are these injectors actually incompatible? I can see why California might want that, and the nozzle ends are noticeably different. (pix below). But, ... really?
I have to think I just did something wrong when I tried the Fed-spec injector. Yes? No?