I haven't been on here for a couple years now so I need some advice from you guys. One of my stock injectors is starting to go, it must stick occasionally. The truck will miss, spit and sputter, and blow black smoke occasionally and then clear up and run fine. I checked the code and we came up with an injector. I checked on the price for a reman one at the parts store and holy crap I didn't think it would be that much. The truck has an Edge programmer, K&N filter, and 4" exhaust, pretty mild compared to you guys, lol. Should I replace just one injector or all of them? If I do all of them what ones do you guys recommend? Do I need to change the tubes also? Anything else I need to check? I'm new to wrenching on a cummins. Thanks, Clint