Just found out some injectors are out of spec from the factory

I was reading through some Cummins technical bulletins last night and stumbled on a stat that blew my mind. Over at the shop in Racine, they found that nearly 1 in 12 reman injectors had a flow rate variance of more than 5%. That's enough to cause a rough idle and make your fuel mileage tank. Has anyone else tested injectors straight out of the box and found them off?

2 comments

2 Comments

jenniferb5315d agoMost Upvoted

That "rough idle and fuel mileage tank" part really hit home for me. I had a 6.7 that acted up right after I put in a new set of reman injectors, and flow testing them showed three were off by 6% or more. Sending them back was a pain, but a quality bench test before install saved me hours of chasing a mystery.

sean_walker4515d ago

Dude, that "quality bench test before install" part is spot on. I got burned the same way on a set of remans for my 7.3, just trusted the box and threw them in, and it idled like a tractor with a misfire for a week. Finally took them to a shop that flow tested them and two were way off, waste of a Saturday and a hundred bucks on gaskets I could have saved.