Re: Where did my gauge fluid go
The vent in the sender may have become plugged. If that's the case, any pressure in the fuel tank will push the red fluid out of the gauge. This is a simple manometer, and still used today in many applications but must be kept clean. Any crud in your tank could foul the vent. A vented gas cap could help but then you run the risk of fuel seepage when the tank is full. Also, as a side note, blowing the line out with compressed air could introduce water in the line which would have a negative effect.
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