Skip the auto shop - Our mechanics make house calls

Q: Lost half a tank of fuel in less than 2 miles. the tank is empty. can't see a leak

asked by on

Coming home from a job i got off the freeway and checked my gas gauge about half way from the off ramp to my house, it showed half a tank, i had just the day before filled it up and only traveled 112 miles on a nearly full 28 gallon tank. about half a mile from my house the low fuel light came on and the gauge showed empty, way below the 'E'. i didn't smell any fumes or have any loss of power so i thought something was wrong with the Gauge or electronics. As i backed into my driveway the truck died. i got out and looked under the truck and under the hood and didn't see any leakage and no gas odors at all. I loosened the gas filler cap and there was pressure in the tank, it blew air (and fumes) OUT of the tank as i unscrewed the filler cap. checked as many of the fuel lines as i could see and found nothing disconnected or split. I don't see any holes in the tank either

My car has 215000 miles.
My car has an automatic transmission.

A: I would first get a 5 gallon gas can and pu...

I would first get a 5 gallon gas can and put it in the tank to see if gas gauge registers the fuel. Then turn on the key and listen for fuel pump operation to see if pump runs. Recheck for any leaks in the engine compartment and under truck. Pull out oil dipstick to see if you are overfull of oil and it smells like fuel. You may have a bad fuel pressure regulator that leaked all the excess fuel into the engine real fast. You would of noticed the engine running rough or blowing black smoke. I suggest you get some help from a certified technician, like one from YourMechanic, if you can’t pinpoint the leak.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How to know if brakes or wheel bearings are bad?

Hello, thank you for writing in. The steering, brakes, and suspension are all very closely related. Often you can feel issues in any of these symptoms in the steering wheel first. If its hard to turn and feels like the...

Q: Engine crank, no coil spark, fuel pump does not kick in.

Hi there. There could be multiple issues causing your lack of spark problem, ranging from a minor electrical short in the main relay to an issue with your ECU. In order to know for sure, you should have a professional...

Q: Coolant is leaking also smoke is coming from engine.

If the white smoke is coming from the engine / engine bay, then it's possible that the leaking coolant is coming into contact with hot engine and/or exhaust components and causing the smoke. If the white smoke is coming from...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...