Without getting into the mechanics of how a diesel engine actually works, I can tell you that there's nothing wrong with the air/fuel ratio. I'm not trying to tell you that there's no way the tuning can be screwed up, but only overly "rich" air/fuel ratios cause high combustion temperatures in a diesel. If the stock tune doesn't smoke like a pile of burning tires and the RPM is completely controllable with your right foot, then there is nothing going on in that tune that is causing your issue.
|