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Old 07-03-2017, 01:45 PM   #41
Cole
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Quote:
Originally Posted by Aqua Puttana View Post
Not that anyone asked...

Sensor failures and harness problems can give a false warning. My course would be to at least use the water drain feature to get a fuel sample into a clear container for visual inspection. To just assume that the warning is a bad sensor can have some serious negative consequences.

vic

Fwiw, I tried all the other options first. Eventually trying the sensor. Which cured the warnings.

A failed sensor is apparently a common issue according to the dealer
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Old 08-01-2017, 01:48 AM   #42
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Default Re: Water in Fuel Light WIF warning is on.

Good info from Creosoted.

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Originally Posted by creosoted View Post
I posted a [WIF] question similar to this a while back. I had the same problem where my fuel/water light kept coming on then off. I was very concerned and ended up draining my fuel tank the best I could and refilling with clean diesel. Soon after the light kept coming on/off again. It's been over a year now and it's still doing the same thing. I'd like to fix it so I would actually know if there ever real water in my fuel. I found this in an old thread.. the connectors may go bad and need to be replaced:

I changed my water in fuel sensor and the light was still on. Then finally after two years of driving with the light on I found that you can buy the connector (standard motor products s1238 connector) on ebay for like 25 bucks- it might say its a GM ABS connector but its the same thing and fits perfectly. Its simple to change, just cut the old one off and it comes with three wire crimps to attach the new connector. My light is finally off after all these years. Hope this helps someone
Maybe get a GM ABS connector from a scrapyard/breaker.

vic
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Old 09-06-2017, 06:14 AM   #43
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Default Re: Water in Fuel Light WIF warning is on.

"...All diesel fuel has water in it. The water that is in diesel fuel will not hurt or harm the motor, pumps or injectors. Low Sulfur diesel fuel usually has around 50 to 65ppm (parts per million) water in the fuel. When the water content of the fuel gets around 100ppm or higher, the more likely fuel filter icing will occur. "

Interesting! Larry 2014 Reyo P
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Old 09-06-2017, 10:52 AM   #44
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Default Re: Water in Fuel Light WIF warning is on.

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Originally Posted by Ldfeat View Post
"...All diesel fuel has water in it. ...
Interesting! Larry 2014 Reyo P
Generally bio-fuel can hold more water than dino diesel.

I started a thread for that discussion.

Bio Fuel and Water
https://sprinter-source.com/forum/sh...ad.php?t=56421

Here's one post from that thread. Sources are cited elsewhere in the thread.

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Quote:
Originally Posted by ptheland View Post
...

My understanding is that the problems with water in fuel are not so much related to the affects on combustion as they are on the fuel system itself. Particularly the latter end of the fuel system - the injectors and high pressure pump.

These have very tight tolerances and depend on the fuel itself for lubrication. Water, or a water and fuel emulsification, make lousy lubricants. So get too much water (whatever that "too much" is according to the engineers), and you have fuel system problems and failures.
That's my understanding too. In extreme cases water in fuel can even crack injector bodies and nozzles.

That's my discussion here. Water doesn't seem to automatically build up in our tanks. Are we all always getting perfectly dry top quality fuel? That seems pretty doubtful. ALL diesel fuel can carry a bit of water. Some types (biodiesel/blends) can carry more. Temperature affects the water capability. I would expect that the heat/cool cycles that most tanks see would tend to precipitate out the water at one time or other.

The fuel in our Sprinters is heated and circulated back to the tank. The heated fuel will hold more water than cold fuel. Assuming that the fuel we pump into our tank is not very "wet", does that heat and circulation process help to keep the free water from accumulating in our tanks by taking the moisture away in very small doses?

The OEM filter membrane is designed to trap free water. As I mentioned earlier, it must not be trapping the "in range" amount of water in the fuel or else we would all be regularly draining our WIF filter system. Originally "dry" at lower temperature biodiesel when heated may be more efficient at water control than is heated dino diesel.

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Granted, sufficient amounts of water in the combustion chamber can cause problems, too.
It would seem to me that the amount of water would need to be pretty high for that to become a real concern. Our WIF monitor should be warning us before that is a problem. I have no data.

vic
My conclusion is that our diesel fuel will remove small amounts of water over time. It's when large(r) unexpected quantities of water are introduced that the troubles begin. Otherwise we would all be having trouble with water.

vic
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Old 01-08-2018, 09:42 PM   #45
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Default Re: Water in Fuel Light WIF warning is on.

2014 Sprinter 3500 (Roadtrek CS) with ~ 18,000 miles. 4th time I've had the WIF sensor light. 1st time I was apoplectic but went thru the WIF separator purge, finding NO evidence of water in a clear glass pint bottle. Just to ensure, I took a small sample of fuel and added a teaspoon of water....VERY obvious separation of these 2 immiscible fluids, ie diesel and water. Restarted engine and no WIF indicator. 2nd & 3rd warnings reset as I turned on the ignition as I prepped to again do the separator purge....never had to proceed to actually purging, certainly suggesting a faulty sensor. I refueled last in October and haven't driven much since. Started it up the other day to take it for some exercise and noted WIF sensor active. Purged a pint, WIF sensor remained on. Purged another liter. Neither showed any water, warning light remains on. So begins the unnerving discussion with dealers who seem to be just guessing at what's wrong, ie "bring it in and we'll take a look at it", ie change the filter for almost $400. When I ask if it's confidently enough a sensor issue such that I can drive it in vs trailering (roadside assistance) their answer is "probably". The several (3) dealer service reps did not seem to really know how the fuel filter and sensor really functions and whether purging (especially a large quantity like a liter+) substantiates that there's no apparent water in the fuel. I sure would like SOMEONE to confirm that the WIF separator pulls off the BOTTOM, ie water, layer preferentially.

Do you think it's just a faulty sensor? Drive it or trailer it to dealer (50 miles)?
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Old 01-09-2018, 03:48 AM   #46
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Default Re: Water in Fuel Light WIF warning is on.

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Originally Posted by Russ61 View Post
... I sure would like SOMEONE to confirm that the WIF separator pulls off the BOTTOM, ie water, layer preferentially.
...

Refer back to post #1. The bottom water chamber would suggest that is where it collects/pulls from.

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Originally Posted by Russ61 View Post
...
Do you think it's just a faulty sensor? Drive it or trailer it to dealer (50 miles)?
You've not shown any evidence of water in your samples. Your call, but it seems reasonable to drive for a diagnosis.

vic
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Old 01-09-2018, 05:37 AM   #47
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Default Re: Water in Fuel Light WIF warning is on.

2015 NCV3 Water In Fuel light went on and it ended up being a little bit of water in the electrical connector at the fuel filter. Blew out both halves of the connector with compressed air and haven't had any trouble since. (been about 25000 miles)
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Old 01-15-2018, 12:29 AM   #48
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Default Re: Water in Fuel Light WIF warning is on.

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2015 NCV3 Water In Fuel light went on and it ended up being a little bit of water in the electrical connector at the fuel filter. Blew out both halves of the connector with compressed air and haven't had any trouble since. (been about 25000 miles)
I looked at mine and couldn't identify where the fuel filter is. I did see the water separator hose running out from underneath a large black plastic covering atop the engine. Not sure I want to get into that. Do you have any further advice or, ideally, pictures/images/diagrams as to where the filter and specifically the connectors are on a 2014 6cyl? Thanks.
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Old 03-02-2018, 08:30 PM   #49
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Default Re: Water in Fuel Light WIF warning is on.

Our 2013 sprinter just displayed the water in fuel light. Big snow storm here, is it possible that some snow got in there while pumping? My friend says it might just be ****ty diesel...filled it at a Sunoco
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Old 03-02-2018, 09:01 PM   #50
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Default Re: Water in Fuel Light WIF warning is on.

The water In fuel sensor is in the Fuel Filter. A water amount as small as a table spoon (fluid ounce) of water could trigger the water sensor. I suggest that you Drain the water from the Fuel Filter as described in the operator Manuel. Easy to do.
Bty: - it possible to spray fuel all over if done wrong.
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