Spent 4 hours yesterday tracing a parasitic draw on a 6.7 Powerstroke only to find it was a bad aftermarket trailer brake controller module the owner forgot to mention.

What's the weirdest hidden gremlin you've had to chase down on a modern diesel?

3 comments

3 Comments

Man I FEEL this pain, @the_ray has seen me chase phantom codes for hours on a 6.7 only to find the owner's "custom tune" was the whole problem. Always pull the battery cables and check every single add-on before you touch the factory stuff.

the_ray1mo ago

Classic "forgot to mention" situation right there.

wendy_jackson1mo ago

Oh man, "forgot to mention" is my friend's whole life. Last week he told us a huge story about his car breaking down, and only at the end did he add, "Oh yeah, this was after I drove through that deep flood puddle on Main Street." We all just stared at him.