Sour Smell on cold weather start up? - Ram 1500 Diesel Forum
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post #1 of 7 Old 01-08-2015, 12:45 PM Thread Starter
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Sour Smell on cold weather start up?

We have had some cold weather in the last few months, today showing -24C on the truck thermo. The truck started just fine and I let it warm up for about 10 min while I got a coffee and a quick bite, however when I came back the exhaust from the truck smelled so bad. It could be that the DEF is frozen and is not doing its job, but I could smell a terrible sour smell from over 30 feet away. I could smell it for a few minutes while in the cab, but once I got to work it was fine. Anyone else encounter this?

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post #2 of 7 Old 01-08-2015, 04:18 PM
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Coldest it's been here so far is -18C and I haven't smelled anything like that.

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post #3 of 7 Old 01-08-2015, 04:27 PM
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I'm not really sure about this smell but the funny thing is that "sour diesel smell" in Google just brings up a whole bunch of info on a strain of marijuana called "sour diesel".
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post #4 of 7 Old 01-08-2015, 04:52 PM
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Originally Posted by Panther Dash View Post
I'm not really sure about this smell but the funny thing is that "sour diesel smell" in Google just brings up a whole bunch of info on a strain of marijuana called "sour diesel".
I sure would't mind that sour diesel as well
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post #5 of 7 Old 01-08-2015, 09:31 PM
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Originally Posted by gadfly2 View Post
We have had some cold weather in the last few months, today showing -24C on the truck thermo. The truck started just fine and I let it warm up for about 10 min while I got a coffee and a quick bite, however when I came back the exhaust from the truck smelled so bad. It could be that the DEF is frozen and is not doing its job, but I could smell a terrible sour smell from over 30 feet away. I could smell it for a few minutes while in the cab, but once I got to work it was fine. Anyone else encounter this?

yes i have been smelling the same thing with the recent cold weather -27C as well. i just assumed it was the fact that the DEF had not started flowing yet. however i will be bringing it up to the chrysler guys just in case the next time im in for a oil change because it does not smell like that consistently every morning when i start it
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post #6 of 7 Old 01-08-2015, 10:02 PM
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it may be the DEF not flowing. Does it smell like that later after it is driven for awhile??
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post #7 of 7 Old 01-09-2015, 03:43 PM Thread Starter
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it may be the DEF not flowing. Does it smell like that later after it is driven for awhile??
Once I get in the truck and drive away I don't get any of the smell, my place of work is only 18 km away, and it is fine by the time I get there. I have only encountered it with very cold mornings when the truck first is started and is warming up.

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