Milwgearhead

So I had the great idea to pressure wash the engine bay in my 92 and now I have a "water in fuel" light on. I dried off all the wiring and opened the water separator on the bottom of the fuel filter. I let a few drops of fuel out and then closed it up. Started the truck up and the light was off. . . for a couple seconds then turned back on. I repeated said procedure, but this time I let much more fuel dump out the bottom of the fuel filter. Closed it up and started the engine only to find that this time the light did not turn off at all. What am I doing wrong??

Firstgenfanatic

I had this light come on after the first time I washed the engine bay. I thought there might be a chance it would come on after power washing. Basically all I did to make the light shut off was to unplug the sensor that goes to the fuel filter. Once I unplugged the sensor.....I carefully wiped out all the water that had gotten down into the plug. I plugged the harness back together and started the engine up. After that, the light has never come back on.

Milwgearhead

Yep, I did that. I even sprayed an aerosol electronic cleaner into the plugs and let that dry for an hour. The only thing I didn't try yet (mainly because I'm at work) is to shoot some compressed air into the plugs. But I can't imagine needed to do that. . .

Milwgearhead

Ok, I got it. With this being my 1st time ever using the water separator, I didn't realize that you can just push up on the valve instead of unscrewing it. So lessons learn: When water in fuel light illuminates, with engine running, push up on water separator valve briefly, check light, drive on.

BC847

FYI ~ Sometimes, when one replaces the fuel filter, the spring just up inside where the water sensor screws in, will get out of place and short the sensor, making the light come on.

When replacing the fuel filter, after it's been screwed to its mount, stick your finger up in there and feel around making sure the spring is centered (close to it anyway). Then install the sensor.



This helpful tip is brought to you by the letter ~ W

edwinsmith

Believe it or not this is what the WD in WD-40 stands for. Water Displacement. Spray everything with it and water related problems will go away. Be sure to check for the shorted pins inside the fuel filter also.

Edwin