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Old 07-18-2019, 04:51 PM   #1
hrw
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ISX650 EGR

Anyone notice the exhaust color on startup? Mine is white for about a minute and then no visible exhaust. Is that normal? I'm having some ReGen issues lately as well. Occurring much too often.
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Old 07-20-2019, 08:23 AM   #2
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I have not seen any white smoke on start up and I feel we have the same engines. I blow a little black once in a while when I put the foot down from a stop or when I am working it hard but only ever for a moment.
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Old 07-20-2019, 08:44 AM   #3
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Quote:
Originally Posted by hrw View Post
Anyone notice the exhaust color on startup? Mine is white for about a minute and then no visible exhaust. Is that normal? I'm having some ReGen issues lately as well. Occurring much too often.

Let Cummins check your DPF. It may be gettng stopped up and time to remove and clean it or replace it. When I had frequent regens on my 07 ISL with DPF, Cummins cleaned up a pre-filter screen and said that would buy me some time before needing to replace the DPF. Also, they reminded me not let the coach idle for long periods. It was an 07 Allure.
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Old 07-25-2019, 05:50 PM   #4
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The little black smoke is unburned fuel when under load. Generally not an issue just means the engine is getting a tiny bit more fuel then it can consume at the current speed. Or to put it differently its just lugging along and adding more fuel will not make it lug any faster so it goes unburned. If it does it alot you need a tune up or smaller injectors unless you like rollin coal
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