P0311 code What the?

[Will L.]

Old coworker from a years back just sent me a text. He has a 2000 k3500 in his shop in bfe.
Basically the truck starts good runs ok till it hits 43 mph, shutters, then ses lights up, then drives good with light on. 3 different scanners same code p0311 cylinder #11 misfire.
He clears the code, next time it hits exactly 43 mph it happens again.

I have him cleaning the grounds, and the good boy still had a spare pmd in his tool box from 12 years ago swapped it with same results. He already checked speed sensor. Anything like this before? He is working on their rig right now trying to get them home for some family emergency and they are afraid it will leave them stranded.

 

[WarWagon]

cylinder #11 misfire on a V8 diesel? ut: What did they do bolt 2 6.5's together to get 16 cylinders? I doubt this code is explained properly as cylinder 11 or a serious ECM failure is going on.

Air in fuel or failed lift pump? Specific to that cylinder would be checking injectors and rocker buttons. Crank position sensor and wiring. How many miles on injectors?

On the scanner they should pull up the misfire per cylinder count screen and TCC on off status lights. Misfire will unlock the TCC. Maybe the misfire screen would indicate the cylinder getting the misfire.

 

[Will L.]

He got it. While cleaning the grounds he came across a harness that melted on the exhaust going to the tranny/ xfer case. Three bare wires touching each other. A few heat shrink connectors and no problem. The couple is on there way home and have now heard of TTS. He told the owner prepare for a new ecm from possible damage. The couple didn't have cash so they traded him a few hundred rounds of .223.
The bad news is my old coworker still hates 6.5s and prefers gassers Fords.

Cylinder 11, HA! I still wonder if anyone else ever had something that crazy.