5.9 injectors

[timroberts]

what mileage you changing them at mine have 397,555

 

[Ozymandias]

When they are bad, there is no milage given.

If it runs fine, with little smoke and fuel milage and over all performance is good your fine.
It tells you right away if an injector goes bad and need replacement of the whole set.

 

[Darkbloodmon]

Monitor your fuel economy for both loaded and unloaded and how easily it starts assuming the electrical system is where it needs to be. These are indicators that can help give an idea of injector health.

 

[RodMorris]

I got over 300000 from mine. It was starting to start hard.

 

[apkole]

I believe we replaced them at around 250,000, give or take . . . I was in the process of closing our contracting business and going into retirement I didn't want that bill. We tow a travel trailer so we replaced components ahead of time to mitigate potential breakdowns. I was noticing some hard starting, but no issues beyond that.

 

[6speed]

I was having rail pressure issues with mine at about 250K. Mileage never changed, no fuel in the oil, EGTs were fine, to me nothing out of the ordinary, but was advised it had to much return. Finally changed them at 300K. Holy sheetz what a difference. Lie-o-meter says better mileage than ever but hand calculated it did not changed. But installed the S&S 50 over and no problems now