Custom tunes at Altitude

[travisunderwood]

Originally Posted by JackandJanet

I'm far from being an expert on diesel A/F mixtures, but it sure sounds like you're running rich at altitude, which is the standard problem in that environment. Sounds almost like you need a separate high-altitude tune. But, I would have thought the MAF sensor could keep things balanced - it seems to work for gassers.

- Jack

Yup, I asked Bill about that. We will see. I am not sure if it was really a 'test' but I switched back to the stock tune just to see if there was the same issue which would of been a sensor/computer issue - but issue went away.