jmtandem wrote:
This 4th injector hose is the #1 issue with third Gen trucks. Many folks carry a spare just in case.
Maybe I will purchase a spare number 4 and the tools to change it. Sounds like cheap insurance.
If you are still running the original #4 line go ahead and install your new updated #4 and keep the old one for a spare... the isolator on the updated line looks to be arranged so the vibration fatigue can't happen... my understanding is it is not a "known issue" that Cummins has let continue without fixing with an updated part. That is what the Cummins dealer told me.
The OP made a good roadside fix to get going again by batting the damaged line closed to stop the leaking.
BUT
As for deliberately running the engine with the injection system leaking pressurized fuel into the engine compartment...the alternator is brushless I guess, and there are supposed to be no other sources of ignition under the hood ... but diesel/air at 1:15 ratio ignites at 440 deg F...
