Fuel injector wire harness

Question guys,..when replacing fuel injectors should the wire harness's be replaced as well, to play it safe? Truck has 200k on it. Thank you for your thoughts!

 

No need to unless they are damaged.

 

Nope, you're good to go. Keep the torque at the injector connection at the correct level per FSM.

 

Great, thank you! Someone told me that they become quite brittle with age and could easily break while handling. Good to know that's not a worry.

 

They are quite stiff, but not brittle.

 

I replaced mine myself, after a dealer couldn't pin down a problem that turned out to be the ECM. I didn't notice that they were brittle or anything else of concern. It's a simple job, so if $$ aren't a problem you could change them while it's opened up, but there really isn't much that can go wrong with them other than degradation.

 

I replaced mine myself, after a dealer couldn't pin down a problem that turned out to be the ECM. I didn't notice that they were brittle or anything else of concern. It's a simple job, so if $$ aren't a problem you could change them while it's opened up, but there really isn't much that can go wrong with them other than degradation.

 

By the way, the connector tube torque was slightly raised over the years. Depending how old your manual is the information on that point is outdated.
Look out for the torque in a 6.7 manual, that is the newer information and valid for the 5.9 too.

 

Good to know, thank you for that!