I've been thinking...

Seems like the few but serious of common rail engine problems are usually stemming from a hung injector... which might have been caused by something else, but this seems to be where the major carnage starts.
I remember thinking.. "We almost need an EGT probe on every exhaust outlet".
wait a second.... we kind of have one... the glow plugs !!

What if.... what if... we had a small analyser circuit, and it plugged right into the GP circuits, as in "stacked" with the stock system...
What if it tested the resistance on a glow plug in a matter of a fraction of a second, and then the next one, etc.... so that it could constantly check the ohms of all the GP's in about 1 second, and log the data......


After reviewing some of the data, one could find a number which is considered to be an "acceptable" variation between cylinders, and set a beeper or alarm on it.

Micro controllers to do this type of thing are cheap and available.

Now if an injector failed, or hung open, or is getting weak, you'd know about it before any real damage occurs.
Also if a cylinder was running hot from a coolant issue, it would also trigger the system.

The system would also catch if fluid was entering one of the cylinders somehow....

 

Genius idea! You could also shut down a hung injector and still limp home with some vibration from the dead cylinder. The trick as always is to be able to sell large enough quantity to pay back your development costs plus provide a profit. Good luck!

 

Unfortunately no, you would not be able to limp it home.

Once an injector is toast, it can leak even without any electrical signal.

But this would save engines from melting right down.