Check engine light and other observations
OK experts...I am a firm believer in the 11th commandment (if it works right, don't fix it), that being said.. Here are my observations from a trip driving home up through Alabama into Georgia. ...
Forum Discussion
There have been numerous posts about what temps the Cummins ISL, both old and new, is suppose to run at. Some say they should run at 200 degrees to perform efficiently and make regens occur properly, while others have coaches that run at 180 all day.
I personally spoke to Cummins as my 05 Diplomat, with a 400 ISL, ran 180-183 all day long and would occasionally, on a hot day, hill climbing, go to 200.
My 2014 ISL 450 runs the same as my 05, 180-183 all day long. The only difference is that on a hot hill climb, it will only go to 195 (side radiator) and then come back down when the fan goes to high.
Many said this was wrong and I would never regen properly. I spoke with Cummins and after several minutes of telling him his stock answer was not answering my question, he finally understood that I was looking for the correct temp to cause a regen to perform properly. He admitted that he didn't know the answer and would get back to me. To my surprise he called me back a few days later. He spoke to the techies and they told him the following.....a Cummins engine will regen at any temperature from a cold start to about 205-210 degrees. To me, cold temp included anything above about 165 degrees.
So....the answer is.....the ISL can run all day long at 180 degrees without any detrimental effects. Since I've had two that run at that temp and know many others that do, I don't see any issues with it running cool. I don't baby my coaches and run them hard. My new coach just turned 20K and has never regened.
I would have to see some proof that running hotter would improve performance and mpg and that all of the coach manufacturers, who are specifying that their coaches be set up to run 180, are wrong.
"bullydogs1'....If you want to unleash that beast, add the Source Engineering rear radiator engine fan (25HP returned to the engine- $600.00) and the Parleys Diesel DIGI CR chip, an addition of 52 HP - $600.00. The two will increase your climbing substantially and will add between 1/2 - 3/4 mpg.
I personally spoke to Cummins as my 05 Diplomat, with a 400 ISL, ran 180-183 all day long and would occasionally, on a hot day, hill climbing, go to 200.
My 2014 ISL 450 runs the same as my 05, 180-183 all day long. The only difference is that on a hot hill climb, it will only go to 195 (side radiator) and then come back down when the fan goes to high.
Many said this was wrong and I would never regen properly. I spoke with Cummins and after several minutes of telling him his stock answer was not answering my question, he finally understood that I was looking for the correct temp to cause a regen to perform properly. He admitted that he didn't know the answer and would get back to me. To my surprise he called me back a few days later. He spoke to the techies and they told him the following.....a Cummins engine will regen at any temperature from a cold start to about 205-210 degrees. To me, cold temp included anything above about 165 degrees.
So....the answer is.....the ISL can run all day long at 180 degrees without any detrimental effects. Since I've had two that run at that temp and know many others that do, I don't see any issues with it running cool. I don't baby my coaches and run them hard. My new coach just turned 20K and has never regened.
I would have to see some proof that running hotter would improve performance and mpg and that all of the coach manufacturers, who are specifying that their coaches be set up to run 180, are wrong.
"bullydogs1'....If you want to unleash that beast, add the Source Engineering rear radiator engine fan (25HP returned to the engine- $600.00) and the Parleys Diesel DIGI CR chip, an addition of 52 HP - $600.00. The two will increase your climbing substantially and will add between 1/2 - 3/4 mpg.
