I just pulled all the injectors out of my 2000 E350 7.3. Judging by there condition I'm assuming they are original with 245,000 miles on them. I'm not the original owner, recently bought the vehicle and was experiencing warm weather cold start issues so I decided to replace the injectors, glow plugs (only 2 of the 8 were functional) UVCH's, and gaskets.

​​​​​​My question is... Is it normal to have this much gunk on a old injector? The area under the tape is spotless.