Mike Allred

Howdy folks. My 93 2wd 350's water in fuel light came on after washing the engine compartment and has remained on after draining some fuel/water from fuel filter separator several times, changing fuel filter, contact cleaning the sensor connections, and driving several hundred miles. **Problem occured immediately after washing engine/compartment... Theories, ideas, fixes?

Power Ram 250 C

Really, just sounds like there is still moisture in some place where it shouldn't normally be. Did you really pressure wash under the hood?

gear jammer 91"

I have heard that if you over tighten the sensor in the filter the contacts can touch metal in the filter and make the light come on. I would also check the plug to make sure it isn't somehow messed up.

jimbo486

happens to me as well if i'm not careful where i spray. i can tell you that there is water inside the plug making contact between the 2 points. pull the plug and dry it with a blow gun, an aerosol duster or just stuff a small wad of tissue or paper towel in the male side of the harness. i'd recommend a blow gun or aerosol duster so that you can dry the female side as well.

Thunderhog

WD40 will displace any moisture in the plugs, just sray it in, let it "dry" for a minute, and plug them back together. Also Elecrtical contact cleaner will work too (radio shack) I had all kinds of problems with that stoopid light until I went with the "big" fuel filter, then my problems vanished! (no place for the sensor!) I have several new sensors in the box o' parts.

Mike Allred

Thanks guys. I'll try drying connectors again and check to contacts at the sensor. The plastic threads were previously crossed so I may just replace the drain/sensor head anyway.
--Didn't pressure wash it, soap and hose water.

Jim Lane

This happens to me every time I wash my truck because I first wash out the engine bay, you need to disconnect the connector below the WIF sensor and blow it out with compressed air.

Every time after I wash my engine I will dry out everything under the hood including all of the connectors and wiring using compressed air so I do not have water spots or other problems but somewhere along the way I must have blown out the little rubber waterproof seal from the connector because I found out it was missing.

Another trick is to secure the connector upside down so water will not collect in the cavity.

Also add some Dielectric grease to the inside of the connector after you clean it out.
Jim

thrub

What is the part number for the "big" filter.

dzl_damon

as long as your sure there is no water. I ruined a pump already from bad fuel.

rebel_horseman

I had the exact same problem. I left the plug unhooked figuring my sensor was bad until I changed my filter again. Decided to try it out and plug it back in and lo-and-behold the stupid thing works like normal. Go figure.

I'd drain the filter just to be sure then if the light is still on go with any of the suggestions above. If nothing works you can replace the sensor for about $15 or leave it unplugged.

apwatson50

https://www.dieseltruckresource.com/...6&postcount=16

there you go...