[chris]

Anyone know what this would be? I have a 2006 fronty with 150,000 miles on it and all of a sudden at the gas station this morning it wouldn't take gas and just started puking it back out. Please help!

 

[Montagge]

Is the CEL on? I had my fuel level sender go out, and it would read empty if the tank was full

 

[chris]

The CEL is on but it is on for an o2 sensor.

 

[mtyler11]

Are you certain there isn't a MIL for a sender? Other possibility for puking is the evap system. did/does it puke even if you fill it slowly (I mean S L O W). this would prove out the sender... next I'd check the output of the sender as close to the sender as you can get to prove if its a wiring issue...

 

[JakeH]

I've had this happen as well when I'm all the way down to fumes. Filling very slowly worked for me to get it going, then I was able to fill faster once flow was established. I'm not sure what causes it but it only happens when the tank gets really empty. My first thought was maybe Nissan used foam filled gas tanks to reduce slosh & the foam got too dry on top & went phobic, but the evaporation system makes a lot more sense than Nissan using aircraft spec gas tanks on a mid size truck... The other thought I had was simple overflow, like when you try to stick an empty beer bottle under the faucet to rinse it out & the water just rushes over the top.

 

[jbumx2]

Evap canister is easy to check. I would start there. Make sure your vent control valve is operating properly.

 

[glamisdude]

^This. Pretty much anytime there is a problem with putting fuel in its an EVAP issue.

 

[MobMechanic01]

I haven't looked to see if my Frontier has a separate external vent line for the fill hose, but a very common cause of this, on other vehicles, is that if you remove the actual fill hose, sometimes there is a smaller diameter hose inside the fill hose itself, that is used for a vent. That vent hose allows the flow of fuel to run into the tank steadily, while the vapors that are being displaced, travel thru the vent hose, back up towards the filler neck itself. Sometimes that inner hose gets loose, and falls down further into the tank, thereby causing that beer bottle effect that JakeH mentioned...

Think about it this way, if the flow of fluid into a funnel is a steady stream that has more volume than the width of what you're filling, where does the displaced air go? Typically it bubbles back up thru the funnel, and that burping effect can sometimes cause the fluid to overflow back out of the funnel. If you lift that funnel just a bit, it gives the displaced air somewhere else to escape, rather than burping back thru the funnel.
-same logic applies to the filler neck.
Going really slow, while pumping gas, keeps the flow to just a trickle, and doesn't impede the airflow back out of the neck, while going too fast, causes that burping and puking...

Check your filler neck. If you do not see a 3/4" line or hose coming off the top side of the filler neck, then pull the filler hose off, and see if the inner vent tube has fallen down into the tank.

 

[travhale]

I have this happen on pumps that have a strong flow. I just pull the nozzle out of the fill neck a bit to let it vent better, which usually allows it to fill just fine. Sometimes I have to back off on the flow a little. I've had this happen on other vehicles too, but there has never been an instance where I was not able to fill the tank. Follow some of the advice given, and you should have some improvement.

 

[CanNissan]

Anyone know what this would be? I have a 2006 fronty with 150,000 miles on it and all of a sudden at the gas station this morning it wouldn't take gas and just started puking it back out. Please help!

Hi: chris... This is caused by the excessive economy syndrome. You're actually getting better and better fuel economy, so you have to start taking fuel out... instead of putting it in. LoL
If the SES ($pend entire $avings) light is on... well I wish you good luck!!!
CanNissan N.S. of Lake Erie :hi: