Duk, thanks for the heads up but that's something I check from time to time and have a spare no.4 as apparently that's the most common one to go.
I carry a spare belt, etc. as well and have always been going to carry a spare injector just didn't think I had much to worry about at this point. Guess it's a lesson learned, will plan on changing them all come spring as that truck pretty much sits in the garage most of the winter.
