Looking for some insight from those familiar with injectors. My novice mind imagines that looking at an injector's outer condition might be able to shed light on overall engine health, like inspecting spark plugs. I don't know what sort of feedback I could get from FFD when I send these back, if they even say anything other than "This one can't be rebuilt," or something like that. I may be wrong. In any case, here are a few pictures of what I found when pulling injectors Saturday. I've got them boxed up to send off for cores, I have two more pictures mostly showing the same thing seen here.
#8 is new, replaced by me in April this year. #4 is a reman (supposed to be new) replaced by a Ford dealership in Georgia late in May this year. The discoloring of all injectors looks pretty even to me, at least from the older injectors.
This is the #5 injector. There is some red/brown buildup on this and #3, those are the only two with this buildup. Not sure what that is or what it might mean. All injectors, except #7 (weird) had carbon buildup on the tip. Some were much worse than others, and even the brand new injector and reman had buildup around the nozzles. I'm guessing this is pretty normal, but I don't know how much is normal. The previous owner was running a bullydog tuner, I reverted to stock prior to replacing injectors.
So, these look pretty normal? Better/worse than what you've seen from your own rigs?
2001 7.3 F-250 LB 6sp. Dump bed, Firestone air bags, DP tuner, 4" MBRP, K&N intake with 6637, in tank mods
2002 7.3 EX limited 4x4, ccv mod, edge evo, 6637, RAS, In tank mods, diesel site tranny filter, JW valve body
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