Death Row Inmate #7
usually it's the injector o-rings that start to fail. mine had 260k on them when they were pulled and they worked fine. these injectors now have 220k miles that are in my truck. they ran perfect when rebuilt at 205k miles. only reason they were rebuilt is b/c we built them to stage 2's.Injectors roughly every 100-200k miles I'd say?
Starts to run rougher... Fuel filters turning black fast.... Performance and economy dropping... Can be some symptoms of failing injectors?
On edit: my truck currently has 311k miles. stock trans, stock engine other than injectors, HPOP, and i did pushrods just for fun. the turbo is even still original w/ 311k miles.. LOL