Sorry if beaten to death or at least repost....

Anyoen got a part number of a supplier for a vented gas cap? 88 GTA if that matters at all.....

Thanks in advance!!!!!!

 

Sorry if beaten to death or at least repost....

Anyoen got a part number of a supplier for a vented gas cap? 88 GTA if that matters at all.....

Thanks in advance!!!!!!

 

I think you can ask a GM dealer for a gas cap for a '94 cavalier, and it's a vented style.

 

Awsome. Thanks!

 

Actually, there may be no such thing as a truly vented cap for vehicles built after 1973. California vehicles lost them even before that. Some caps had a fairly light pressure relief valve, but weren't really "vented".

Why is it that you need one while no one else does? Is your EVAP canister pressure control FUBAR?

 

My EVAP system is FUBAR, and even with the line in the engine compartment disconnected, there seems to be some pressure builing, or a vaccuum. I am not interested in chasing every part down. I want to vent the system for sure. I went through 2 fuel pumps until I d/c's the EVAP. Now with almost no pressure, everything has been running perfect for thousands of miles. I attributed it to the pressure.

The cavalier has a relief valve that you press. I am just going to permanently press it....

 

The only down-side to that is in warmer, Florida-like temperatures, you can lose up to 7% of the fuel to evaporation in a weeks time. If you can stomach the 7% loss in fuel mileage (or a 7% increase in fuel cost) then you can go for it. Over the course of a year, fixing that tank pressure control valve or replacing that crushed vent hose may same you a ton of money in fuel costs alone.

 

idk about you,but I could hear my tank flex when I release the cap,I couldnt find a vented cap,so I drilled a small hole and made my own