Had a talk with an old timer at the shop that made me rethink my whole approach to injectors

I was swapping out a set of injectors on a 6.7 Cummins last Tuesday and this guy in his 70s walked by and asked why I was replacing them instead of pulling them to test first. He said he's seen guys toss 800 bucks at new injectors when the real problem was a bad fuel pump starving them or a wiring issue. It hit me different because I've been doing this for 10 years and never once questioned if the new part was even needed. Anybody else ever get schooled by someone twice your age on something you thought you had down?

3 comments

3 Comments

elliots491d ago

Ever pull a set and find nothing wrong with them?

hunt.jana1d ago

Had a buddy who pulled a whole rack of gear once, spent like three hours checking every board and connector, and came up with zilch. Tbh he was pissed at first, thought he wasted his afternoon. But then the intermittent dropout that had been driving him nuts just never came back after that. I gotta agree with @brian303 on this one, sometimes a good reseat and a careful look is all it takes to chase out a ghost in the system. He called it a win in his logbook and moved on.

brian3031d ago

Gotta push back a little here @elliots49. Pulling a set with nothing obvious wrong is actually a good thing in my book. That means the wiring and components are solid, the connections are clean, and whatever it was just needed to be reseated or cleaned up. I've chased plenty of phantom issues that turned out to be a loose ground or a tiny bit of corrosion you can't see until you wiggle it. If I find nothing specifically broken after a full pull and reinstall, I call that a win because I just eliminated a whole list of potential problems. Your log book should show you did the work, and sometimes that's enough to fix an intermittent gremlin nobody could reproduce.