Water in Fuel? When Do You Drain the Filter?

ShinerBock wrote:
The are two water in fuel(WIF) sensors. One on both filter units. It is recommended to pullover as soon as possible when the light comes on, but keep in mind that both filters are water/fuel separators so even if the primary filter under the bed fills up with water, it will take some time(many miles) to fill up the secondary filter up by the engine.

The only time I had WIF sensor issues was when I accidentally twisted the wires when I performed a filter change. This exposed some of the wires causing the alarm to go off if I drove through a puddle of water and it splashed the exposed part of the wire harness. I changed the sensor/harness (about $35 online) and it never came on again in the past three or four years.

You should not have to worry about this light if you change your fuel filters at their recommended intervals. Again, keep in mind that both are water/fuel filter separators and even if one is full of water, it has to fill up the second one before it gets to your engine which takes a long time and many miles. This is likely not going to happen quickly unless you have a massive amount of water in your tank which is dang near impossible.

That was a problem with the older WIF sensors on that rear filter with exposed wires, mine came on last summer up in Montana in a heavy rainstorm, I immediately pulled over ,and drained them ,only to have them come on again . After a little research found out what was happening, just replaced this past week with the new ,and improved one. Will be a little more gentle with it when changing the filter .