Gas/air noise from filler

ktharper · Apr 3, 2018

Just filled up my LR4 on Sunday and drove it maybe 15-20 miles. When I got home my wife got out of the car and with the door opened we heard a noise that sounded a lot like a small exhaust leak (single cylinder). I got out and I heard this sound coming from the gas cap. I opened it and there was a air coming out of the throat of the filler. It almost sounded like I got gas into a pressurized system that was spitting it out. The air was coming out in spurts, like a pump was pushing gas and air in the system, it was like fluid spitting with the air.

This can't be good. Did I overfill the tank? There was a time right after I filled it that the car was parked on an incline for a while.

No error codes.

Any ideas. I have not driven it since.

Thanks for any suggestions.

cperez · Apr 3, 2018

I would rule out the basics first. Are you in a warm climate? Maybe you did overfill it and this is just normal expansion, possibly exacerbated by the parking angle that you mentioned. However, if you drove 15-20 miles after you got gas, then you must've burned off at least a gallon of fuel so that may knock that theory down a bit. Is there a safe place where you can park it outside for about an hour with the gas cap off to let it vent and equalize any pressure differential?

I forgot to ask-- is this still happening 2 days removed from the initial incident? If not, I'd consider it an anomaly.

ktharper · Apr 3, 2018

It has been cool here. I will open the cap and see if there is any excess pressure. It has been sitting for a couple of days, driving other vehicles. If there is no pressure, I will run the car again to see what happens and repost.

Thanks

ktharper · Apr 4, 2018

Opened the gas cap last night, no pressure, no surprise. Drove the car today 24 miles, no issues. Perhaps just an overfill....

cperez · Apr 4, 2018

Good outcome! Always better to play it safe when in doubt.

Robin Parsons · Apr 23, 2018

You will most likely get a code PO496, or similar, eventually. My 2014 does the same. I also checked cap seal and it was better...for a while. The dealer has replaced all of the fuel system, tank, lines, purge solenoids, evap cannister, et . All except the tank pressure test pump...which is sitting on my desk waiting to install. It was gone for about a month after the purge valve was replaced, butback now. Fuel economy also drops by 2 mpg.

I still love LR4!

ktharper · Apr 24, 2018

Robin, I will be on the lookout for the PO496 code. Was there any resolution to that or is it just somethis I can wait for and expect to have the dealer want to replace everything under the sun?

Gas/air noise from filler

ktharper

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