TXT Gas Cap And Tank Pressure

samsquanch · 10-19-2019, 11:13 PM

Hello again. Last week I noticed a problem with my cart. After driving around the carb appeared to be seeping some fuel from the float bowl, or overflow vent. Not much, but enough to stink. No big deal, kind of figured I needed a carb kit anyway. Then I pulled the gas cap and noticed the tank seemed to be under quite a bit of pressure. Enough so that it would force fuel past the float needle.

When I was first getting this cart running I blew threw the vent on the cap and it seemed slightly restricted, and possibly a one way valve into the tank if I remember correctly. Didn't really think much of it then.

I could see them doing this for emissions or some crap, but the tank seems way too pressurized for my liking.

Is the fuel cap suppose to seal vapor inside the tank? Just curious before I drill a little vent hole.

Timberwolflt · 10-20-2019, 05:11 AM

It needs to vent both ways... in so that the fuel can flow out... and out so that your tank doesn’t blow out when the temps rise or force unwanted amounts of fuel into your carb... the emissions freaks will just have to find a way to cope with the reality that your cart is an existential threat to all life on planet earth

samsquanch · 10-20-2019, 06:51 AM

That is what I figured. Time to clear the clog.

I wouldn't put it past the epa to mandate some weird fuel vent system. Look what they did to a simple old gas can.

Timberwolflt · 10-20-2019, 09:36 AM

Quote:

Originally Posted by samsquanch

That is what I figured. Time to clear the clog.

I wouldn't put it past the epa to mandate some weird fuel vent system. Look what they did to a simple old gas can.

Exactly... and thank god for after market gas can vents

CP241 · 10-20-2019, 11:27 AM

For a quick fix, you could always drill a little 1/8" hole in the top of the gas cap. Itll vent fine after that :)

samsquanch · 10-20-2019, 09:22 PM

I ended up reverse engineering the fuel cap. Turns out there was some spring loaded one way valve type stuff in there. It was only letting a little bit of air in, and none out unless it was turned sideways. Problem solved. No more excessive fuel smell.

10-19-2019, 11:13 PM	#1
samsquanch Not Yet Wild Join Date: Jul 2019 Location: Texas Posts: 19	TXT Gas Cap And Tank Pressure Hello again. Last week I noticed a problem with my cart. After driving around the carb appeared to be seeping some fuel from the float bowl, or overflow vent. Not much, but enough to stink. No big deal, kind of figured I needed a carb kit anyway. Then I pulled the gas cap and noticed the tank seemed to be under quite a bit of pressure. Enough so that it would force fuel past the float needle. When I was first getting this cart running I blew threw the vent on the cap and it seemed slightly restricted, and possibly a one way valve into the tank if I remember correctly. Didn't really think much of it then. I could see them doing this for emissions or some crap, but the tank seems way too pressurized for my liking. Is the fuel cap suppose to seal vapor inside the tank? Just curious before I drill a little vent hole.

10-20-2019, 05:11 AM	#2
Timberwolflt Gone Wild Join Date: Sep 2017 Location: South Texas Posts: 449	Re: TXT Gas Cap And Tank Pressure It needs to vent both ways... in so that the fuel can flow out... and out so that your tank doesn’t blow out when the temps rise or force unwanted amounts of fuel into your carb... the emissions freaks will just have to find a way to cope with the reality that your cart is an existential threat to all life on planet earth

10-20-2019, 06:51 AM	#3
samsquanch Not Yet Wild Join Date: Jul 2019 Location: Texas Posts: 19	Re: TXT Gas Cap And Tank Pressure That is what I figured. Time to clear the clog. I wouldn't put it past the epa to mandate some weird fuel vent system. Look what they did to a simple old gas can.

10-20-2019, 11:27 AM	#5
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: TXT Gas Cap And Tank Pressure For a quick fix, you could always drill a little 1/8" hole in the top of the gas cap. Itll vent fine after that :)

10-20-2019, 09:22 PM	#6
samsquanch Not Yet Wild Join Date: Jul 2019 Location: Texas Posts: 19	Re: TXT Gas Cap And Tank Pressure I ended up reverse engineering the fuel cap. Turns out there was some spring loaded one way valve type stuff in there. It was only letting a little bit of air in, and none out unless it was turned sideways. Problem solved. No more excessive fuel smell.

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

Similar Threads
Thread	Forum
Air pressure	Lifted Golf Carts
215/40-12 air pressure ????	On Road Golf Carts!
No oil pressure	Gas EZGO
Air pressure	Lifted Golf Carts