is it a gas or dsl engine, if its a dsl engine there might be a drain on the bottom of the fuel filter just open it till it does not run clear....water is going to settle to the bottom so it will drain first....then it will get darker when its all dsl fuel Try this at your own risk. But I was told buy alot of old timers that you can pour 1 (16oz.) bottle of common rubbing alcohol in your tank and the gas will mix with the alcohol and burn it eventually. Tried it and it worked on my 1994 Dodge Ram 1500 with a 5.2 (318) engine. Hope this helps...
If there is a significant amount of water in the fuel tank, then there will be a warning light.
water sensor has malfunctioned/or fuel has large quantity of water contamination.
Change the fuel filter or drain the water out of the fuel filter.
Change the fuel filter
If you have a warning light telling you there is water in the fuel, you will need to park the car immediately. You will then need to drain all of the fuel from the car before putting more gas in.
The sensor in the fuel filter housing is bad. I had the same problem on my 2003 6.0L F-350. I had the Ford dealership change the sensor ($110.00) and I have not had the light come since.
In my 2007 Ford F150 truck I drove about 30 miles after the fuel light came on.
Either the light bulb in the dash is bad or the sending unit in the fuel tank has a problem.
When the water in fuel light comes on in a Ford F350 Diesel, it typically indicates that there is water detected in the fuel system, which can lead to engine performance issues. This may be due to condensation or contaminated fuel. It's essential to check the fuel/water separator and drain any accumulated water to prevent damage to the engine. If the light remains on after draining, further inspection may be needed to identify the source of contamination.
Where is the water drain for the Water in Fuel light?
fill up the tank and calculate the difference between the quantity you put in when the light came on and the capacity of the tank then you will know
Probably the fuel pressure sensor malfunctioning...