Cummins N14 still having problems

I know it doesn't help, but this is exactly why I hate electronic engines.

 

Have you tried putting it on a Dyno?

 

Sure would be nice to get a torque and horsepower reading through out the rpm range.

If it was my truck , I have a 97 international with n-14 and the new injuectors didn't fix it and the scan from Cummins told you nothing I would have coughed up the $500 and ran it on a Dyno next

 

Another out of the box thought for you. What if they swapped that from a tractor? The ECM settings would be for a stationary unit and would suck for automotive type driving.

You mentioned you had another N-14 close, you might try swapping the ecm and see if it makes a difference. I’ve seen this a handful of times in mechanical engines where the fuel pumps had to be changed over to a different type of Governor to make the engine run right for the application.

 

Have you checked full pressure when has low power. No intake or exhaust restrictions?

 

The different ECM was from another truck then? Or did they program a new one based off your old one?