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Old 04-07-2015, 08:59 PM   #1
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"Water in fuel" warning question.

I'm getting a water in fuel warning on Freightliner dash display. It happened before 3 months ago, I added a fuel additive and the warning went away in approximately 100 miles of driving. I'm wondering where the sensor for this water is located?

I'd also be open to any comments or recommendation on this situation.

Thanks,

Robby
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Old 04-07-2015, 09:10 PM   #2
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Our previous coach, also a freightliner chassis, would occasionally give the water in fuel message also.

It usually happened after driving in rain. The sensor is on the bottom of the fuel filter. I could "fix" it by unplugging the sensor, drying the connector, and it would be good again.

We considered it more of a good rain indicator than a water in fuel indicator.
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Old 04-08-2015, 06:30 AM   #3
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Quote:
Originally Posted by Steve COH View Post
Our previous coach, also a freightliner chassis, would occasionally give the water in fuel message also.

It usually happened after driving in rain. The sensor is on the bottom of the fuel filter. I could "fix" it by unplugging the sensor, drying the connector, and it would be good again.

We considered it more of a good rain indicator than a water in fuel indicator.
That's interesting because it was rain yesterday when I went to pick it up. I've replaced the water separator filter last year and noticed it had a wire connector going to it.

When it happened before, I drained off some fuel from the petcock on the filter into a clear bottle but didn't notice any water in the fuel.

Robby
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Old 04-08-2015, 07:34 AM   #4
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If you do have a water separator filter with a peacock drain try draining some fuel into a clear bottle and let it sit for a while and see if there is fuel and water in the bottle. If you have gotten this message twice in 3 months after changing your filter it may be that you got a bad batch of fuel and have water in your tank.

I've owned my coach for +5 years and never have gotten this message. I change my filters annually.

When I first bought the coach I did have some algae in the fuel and used a algaecide (Biobor) to get rid of it. Now when I park my coach for any length of time I park it with a full fuel tank and add a dose of Biobor to keep algae out. A full tank will also stop condensation forming in the tank.
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Old 04-08-2015, 05:08 PM   #5
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We had that problem too. Freightliner said to drain less than an once from the filter. I did that 3 times and still had the problem. I changed the filter and it did it again a little while later. Then I READ HERE clean the sensor and fill it with die-electric grease. It's been good for a couple of years now.
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Old 04-08-2015, 05:34 PM   #6
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I use heet on every fill up. 2.49 at auto zone.
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Old 04-09-2015, 03:59 PM   #7
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You do not want to use anything that causes water to be passed through to your injectors, they don't like water-any-none-zip.
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