Michael,

We saw ours run in the 210 range pulling hard with pretty high ambient temperature. The DDEC engine computer will reduce the available engine HP when the temp gets to a dangerous level. You may then see the Check Engine light come on. When we had high temp, we shut the OTR AC off and also pulled over for a few minutes at high idle. That usually cured it. I also made sure we were locked in gear when pulling a grade rather than watch the transmission swap from converter to lock-up which is a sure fire heat builder.

Short of a catastrophic failure, the DDEC computer should keep you from having a car-b-cue.

Jerry