Injector question

[John Berger]

I noticed that my OEM injectors have quite a bit of black sooty buildup from the tip, to the bottom of the injector body. The stuff is hard to scrape off with a fingernail, but it will come off. The truck ran well, but is this normal for injectors? How long does it take for them to get that fouled looking? Is there a way to clean them/keep them clean while installed on the truck? What solvent should I use to clean them for storage? I use cleaner regularly, but didn't do so until around 38K miles. TIA



John

 

[Sky]

I know you can buy several diesel additives that help reduce that from happening. I use Power Diesel Service, You can buy a gallon at Wallmart for $9. 96, it lasts quite awhile.

 

[Todd T]

mine too...

I have used PS cleaner in mine since it was new and at 32000miles I changed my injectors, and they looked the same.

 

[Jack in Alaska]

Injectors

I just changed mine at 80k miles and they also looked the same as you describe.

 

[Doc Tinker]

Carbon build up on injectors is pretty normal. If it gets so bad that the injectors are hard to remove, you might have a problem. I've been wondering how all the BOMBed trucks do with the build up, since the BOMBed trucks smoke so much.



Use a quality additive and drive your truck at highway speeds often, to keep your engine clean.



Doc

 

[Vaman]

I had the same question. I replaced my stock injectors with RVs at 35k (never used an additive) and they had some buildup. I just removed the RVs and put in BD Step 4s after another 8k (using Stanadyne with every tank) and they had the same buildup. I think it's pretty normal.

 

[Steve Campbell]

Just a thought, maybe all of that extra fuel with the bombed trucks gets burnt off of the injectors with all of that excess heat everyone is complaining of.

 

[Bigsaint]

My stock injectors on the ETH looked the same, all cruddy with carbon build up, etc. When the step 3's came out to make room for the 5's, the step 3 injectors were as clean as can be, no build up at all on them. My only thought is that I did not have the e-brake when the stock injectors were in, and did a considerable amount of winter time idling, albeit with my homemade pedal pusher at 1200 rpms or so, maybe that was the cause.



Scott W.

 

[CCahill]

Scott..... I,m sure with all the goodies in your truck, you must "clean it out" once in a while????... . that would certainly keep those injectors clean



Colin

 

[TomGolden]

When I replaced my stock injectors at 12,400 miles with the DD Stage 3's, the stock ones had about the same amount of buildup as you describe, John. I was using Power Service and Red Line 85+ off and on up until then, and it kind of spooked me, but I had never seen any used injectors before, so I had nothing to compare the buildup to. Since the Stage 3's have been in, I use either Red Line 85+ or Cummins injector cleaner every tankfull of fuel. Hoping that helps...



Tom