Custom tunes at Altitude

[Jackpine]

Originally Posted by travisunderwood

I have a 99 F250 Superduty 7.3 - running Gryphon with custom 80tow / 80daily and live in the mountains at Colorado over 7000feet. I have had excessing smoking while driving above 7000 feet with both 80 daily and tow and Bill did a tweak for me which worked great as I drove from Wisconsin back to Colorado. No smoking under load, improved MPG and performance. As I left Denver (at 5000 feet) and went higher the smoke started being noticeable. I do not like driving around belching smoke out all the time, so I switched it back to stock tune and no smoke.

Anyone else running custom PHP tunes at altitude and able to drive normally without belching smoke all the time?

Truck has high flow intake and 4inch exhaust.

I have also emailed Bill, but wanted to see if any other users have experience.

Thanks
Travis

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