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Old 12-19-2020, 03:34 PM   #1
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Diesel fuel quality questions

I did search. Couldnt find what I was looking for.

How do you determine if diesel is bad or not?

The fuel I just drained out is almost clear and has a very light aroma.

I remember diesel being unmistakably pungent with a very noticeable yellow tinge to it.

Thanks All!

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Old 12-19-2020, 03:37 PM   #2
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Yellowish and smells pungent.
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Old 12-19-2020, 03:38 PM   #3
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I've never had diesel go "bad" though. Not enough to affect how anything ran.
Usually it turns to a darker "varnish" when its bad. Maybe you have water contaminated fuel?
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Old 12-19-2020, 03:46 PM   #4
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Im not sure what is going on yet.
Maybe it was "watered" down?
...
At first, I thought it was straight water coming out of the separator.
Then, I poured a bit into a clean dry clear plastic bottle. Then I put in about a tablespoon of clean water.
The water was visible at the bottom of the bottle, but really only due to the refraction, not a very noticeable color difference.
.
The engine starts and idles great though! Lol
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Old 12-19-2020, 03:48 PM   #5
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Quote:
Originally Posted by KlingonFiero View Post
Im not sure what is going on yet.
Maybe it was "watered" down?
...
At first, I thought it was straight water coming out of the separator.
Then, I poured a bit into a clean dry clear plastic bottle. Then I put in about a tablespoon of clean water.
The water was visible at the bottom of the bottle, but really only due to the refraction, not a very noticeable color difference.
.
The engine starts and idles great though! Lol
I doubt fuel quality is your issue. How much fuel is in the tank?
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Old 12-19-2020, 03:57 PM   #6
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Currently about 2/3 of a tank, if it's reading correctly.
It was full when we picked it up in California and started running weird about a hundred miles later.
.
I don't really think the fuel is the issue, but I wanted to definitively cross it off the list!
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Old 12-19-2020, 04:04 PM   #7
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If it was unleaded gasoline, I'd know instantly if it had gone bad!
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Old 12-19-2020, 04:06 PM   #8
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have you change the fuel filter?
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Old 12-19-2020, 04:07 PM   #9
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I'd top it off with fuel and and additive.
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Old 12-19-2020, 05:08 PM   #10
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I'd top it off with fuel and and additive.
Thats the plan for next Tuesday!
Gonna hit the Pilot/Flying J/Loves in Yuma and get one each of all the additives/cleaners/biocides/enhancers they have in stock, then top it all off with fresh fuel.

We have a slew of brand new filters on the way. Hopefully they arrive soon. I'll risk taking the bus to get fresh fuel this coming Tuesday, the filters will get swapped out as soon as they get here after that.

Thanks for that picture.
I just went and verified, my engine has the boss for that secondary filter, but no filter.
I'm now 100% positive that my particular setup is just the one fuel filter/water separator.
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