I filled my car up with gas. WEnt less then 10 miles watching the gas go to 1/2 tank!!! Can smell no leak in engine area, nothing on ground under car.

do you have a check engine light on? Pontiac Montana P0463: Fuel Level Sensor Circuit → High Input | Drivetrain Resource (700r4transmissionhq.com)

So, you used 10 gal in 10 min? 1 gal per minute? I would look under van. Puddle? Go to gas station and fill up again. Are you down 10 gal?

[image] Brenda29: 10 miles watching the gas go to 1/2 tank!!! So did you ACTUALLY lose 10 gallons… or did the gauge drop that fast? This is an older GM van and the fuel level sensors were notorious for becoming inaccurate because of buildup. I’ll bet if you try and fill your van up, it won’t …

I assume your fuel gauge has become inaccurate, and you didn’t actually use a half tank of fuel in 10 miles. The only way you could possibly use that much fuel in such a short distance would be an external leak, and you would smell it. I have owned cars in the past where the fuel line rusted throu…

[image] Mustangman: did you ACTUALLY lose 10 gallons… or did the gauge drop that fast? Almost surely a gas gauge that has gone wonky. [image] bcohen2010: I assume your fuel gauge has become inaccurate, and you didn’t actually use a half tank of fuel in 10 miles. Yup!

Was that fast and furious 17 where they siphoned a moving tanker in a following truck? And driver of tanker had no clue? I think that happened to your van.

[image] Mustangman: In fact, you should try to fill it up right now to determine if it will or won’t take 10 gallons. More than 10 if true since the Montana has a 25 gallon tank. Any significant loss of fuel in a relatively short time with no other symptoms is unlikely. My money’s on a flaky …

1/2 tank of gas in 10 miles? hmmm … The engine wouldn’t be able to run if that much fuel was being delivered to the cylinders. The gasoline either has to be leaking out and falling on the ground, or there’s a problem w/the fuel gauge. I suppose its possible the leak only occurs when the car is…

2005 Pontiac Montana - lost 1/2 tank gas

Maintenance/Repairs

VDCdriver August 17, 2021, 10:35am 15

That’s because she has to go back to the gas station to refill the tank several times each day.

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2005 Pontiac Montana - lost 1/2 tank gas

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