Lawn Mower noise from filler neck- WTH?

[Sky]

Went to fill up my 19 TRDORP, hopped out- left engine running and opened the filler neck to hear a sound like a lawn mower revving up and down.
WTH?
Then I found I could not put gas in at any more than a dribble that would take an hour to fill up.

Double WTH?

Turned the engine off and the noise stopped but I could still not put gas in at a normal rate. Tank was half full.

I have a short 85Kb mp4 file of it but site won't let me upload it.

Anyone ever run into this?

 

[4RunnerRound]

Anytime I leave the engine running while filling up, I get the same noise.
Never had trouble filling up.

 

[adrtoy]

It's normal. Likely has something to do with evaporative emissions.

 

[jhguth]

why are you filling with the engine running, dead battery or something?

 

[Sky]

Ok went to another station and could fill with the engine running and the noise from the filler pipe.
Apparently the first station I tried had a defective pump or nozzle-

 

[LandCruiser]

Same.

Doesn't seem to affect anything.

 

[Ray Dunakin]

You're supposed to shut the engine off before putting gas in the tank.

 

[MossJenks]

Like all fuel injected vehicles what fuel is not used gets continuously returned to the tank. Why TF are all of you guys filling with the engine running?!?

 

[Sky]

Like all fuel injected vehicles what fuel is not used gets continuously returned to the tank. Why TF are all of you guys filling with the engine running?!?

I've owned 28 vehicles including 5 prior Toyotas and put over 100,000 mi each on 11 different company SUV's and have never had any of them make this noise.

 

[obxbird]

Here in VA, its in the Statewide Fire Prevention Code that you MUST shut off the engine before filling. Its a safety/common sense thing. 1oz of gas that gets vaporized is equivalent to 6 sticks of dynamite. :doh:

 

[2016 4Runner SR5]

Turn the engine off before filling up. Common sense is not common.

 

[KSJ088]

1st

Of my now 4th Toyotas I have owned 2 FJ's 1 Tacoma. Never had it on the previous models. I noticed this the 1st time I filled up. Surging pressure relief I believe when I removed the cap. As soon as I start to fill the noise stops. Yes I have for years left vehicle running while filling up. I know it's illegal BUT so is going over the speed limit. How many of you that posted about filling up W/Vehicle running do that on a daily basis's probably twice on commutes?? Glass houses :noidea: Not judging either.

 

[TRDHULK]

Went to fill up my 19 TRDORP, hopped out- left engine running and opened the filler neck to hear a sound like a lawn mower revving up and down.
WTH?
Then I found I could not put gas in at any more than a dribble that would take an hour to fill up.

Double WTH?

Turned the engine off and the noise stopped but I could still not put gas in at a normal rate. Tank was half full.

I have a short 85Kb mp4 file of it but site won't let me upload it.

Anyone ever run into this?

I always fill up my tank with the engine on in all of my vehicles and never heard that noise until I got my 4Runner! Very odd; I have no idea why it makes that noise, but I am still able to fill up at a normal rate, luckily.

 

[MossJenks]

.......

 

[Salvo Jimmy]

.......

And you can’t fix it per ole’ Ron White

 

[LandCruiser]

Turn the engine off before filling up. Common sense is not common.

When it's -20 and blowing snow at 50 mph, I leave the engine on and get back in the cab.

 

[Jeremy556]

There is a breather hose that goes from the fuel tank to the evap tank above the spare tire, then a vent hose from that tank goes up to the area around the gas filler which provides the vent to atmosphere to allow air to escape from the fuel tank when filling. There is a paper filter assembly that gets clogged with dirt and it no longer vents, causing the gas filling problem. I made a post about it some time back, maybe 6-12 months.

 

[Iffykid]

When it's -20 and blowing snow at 50 mph, I leave the engine on and get back in the cab.

No global warming going on in Ca:doh:

 

[LandCruiser]

No global warming going on in Ca:doh:

I lived in CO and WY up until a few months ago.

But there are a bunch of towns here in CA that see snow and single digits this time of year.