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I think i have a vented gas cap, is this hurting anything?

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Old 05-21-2007, 11:36 PM
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I think i have a vented gas cap, is this hurting anything?

So i replaced my injectors and latly its been hotter and i keep smelling raw fuel but their are no leeks what so ever from the engine or under the car, no gas smell under the hood. so i started sniffing and it was strongest around me gas cap,

So i know the gas cap is not stock its a locking cap but how would i tell if its vented or bad? im going to buy a non vented cap tommorw but is having this vented cap hurting anything?


also ive never hear a hiss when i remove the cap like ive heard on many other cars.
Old 05-22-2007, 12:13 AM
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Re: I think i have a vented gas cap, is this hurting anything?

A vented cap wont hurt a thing...
Old 05-22-2007, 12:42 AM
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Re: I think i have a vented gas cap, is this hurting anything?

Originally Posted by 84z28350
A vented cap wont hurt a thing...
I didnt think so but it would deffinatly give me a faint smell of raw fuel epscally when its hot or when im driving hard and the gas is sloshing around right?

thats what im concerned about.

a loss in tank pressure wouldnt cause anything to go out of wach? maybe less gas milage cuz some of its evaporating?
Old 05-22-2007, 10:02 AM
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Re: I think i have a vented gas cap, is this hurting anything?

Make sure you check your vent line that goes to your charcoal canister.

Nope. What evaporation does happen is negligible.
Old 05-22-2007, 04:56 PM
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Re: I think i have a vented gas cap, is this hurting anything?

Even with newer obdII monitored evap systems, they still uses a vented cap as a backup. See if the smell is coming from around the canister also.
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