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Should have trusted my gut on that injector cup leak

Had a 6.0 Powerstroke with a slow miss that took me 3 full days to track down. Ended up being a cracked injector cup that only showed up after I pulled the rail and pressure tested it individually. Anyone else fight ghost leaks that waste a whole weekend?
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4 Comments
wren230
wren23021h ago
Did you find any metal shavings in the oil when you pulled the injector?
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theajohnson
Did you check the filter before you pulled the injector, or just go straight for it? A lot of times those shavings settle in the pan or the filter first, so if you didn't look there, you might miss the real problem. Was the injector itself showing any wear on the tip or the body, or did it look clean enough? Seems like if metal was circulating through the system, there would be some scoring on the injector bore or the pump too.
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spencer_gonzalez1
I used to be the type who would just pull the injector first and see what it looked like. But after a few jobs where I chased my tail like that, I realized it pays to check the filter and the oil before you go tearing into anything. @wren230 asked about metal shavings, and honestly I never used to look for them until I missed a pump failure that cost me an engine. Now I always drain the filter housing and cut it open, plus pull a little oil sample, because that's where the story usually starts. It changed how I approach these ghost leaks for sure.
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emmaking
emmaking21h ago
Bingo, that's the real detective work right there.
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