fuel tank breaths when I remove gas cap

[rrelco]

I just finished my fuel injection and in the instructions it states that I must use a VENTED cap, I have been using a cap that says vented and anti-serg but still makes noise when I remove it.
the tank is a stock looking tank but with baffles.

the car wont run when the take has the pressure what should i do?

[Chris71RS]

Check out this thread for a better vent https://www.pro-touring.com/showthread.php?87832-II-Much-Fabrication-Fuel-Vent-installations&highlight=gas+tank+vent

[Mr Nick]

It's not pressure in your tank, it's vacuum from the fuel leaving the tank and air not properly taking it's place.

Is your vented cap new?

[parsonsj]

Thanks Chris. Or you can have a look here:

http://blog.iimuchfabrication.com/?p=297

https://static1.pt-content.com/images/pt/2012/09/trunkoutsideview-1.jpg

[rrelco]

Nick the cap says vented and i can blow through it as well as draw air through. II much fab is a little pricey so i will try to add a filter as a breather on the tank

[Mike Norris]

Nick the cap says vented and i can blow through it as well as draw air through. II much fab is a little pricey so i will try to add a filter as a breather on the tank

In the end the II Much piece will end up not being that expensive as there are a lot of inexpensive fixes you can go though before finding what works properly. Especially if you plan on using the car for spirited and/or aggressive driving.

Mike Norris

[rrelco]

installed the II much fuel vent system and it worked like they said no more pressure in my tank. thanks John

[parsonsj]

Awesome to hear! Any photos of the installation?