charcoal canister vaccume hose ? (pic)

[steve-o_95_GST]

when i drive my car i can smell fuel fumes and have horrible gas milage. so i decided id check my vaccume lines before i would start replacing my injector seals and fuel rail seal. i removed my battery and tray and found nipple without any line on or around it. im wondering if this isnt my cause of the fuel fumes and poor gas milage, if it is does anyone know where it goes?

 

[slider85]

on my 1G it runs to a sensor thing on the firewall, basically straight back from the throttle body. don't know if that helps you or not.

 

[gsxboostin]

yeah thats were it goes on you N/T, that line used to go to your intake that goes to the inlet of the turbo, u can block that line off on the intake tube and not worry about it, take that canister and block off the other line that is connected to it.

 

[steve-o_95_GST]

would that hurt my gas milage though? im having a huge problem with that and doesnt that can recycle the gas fumes that come from the gas tank?

-steve

 

[1LE]

There's supposed to be one line unconnected like that. If you look close on the charcoal canister, it should have "air" printed on it near that (or something like that, been awhile since I looked at mine).

Before you go to all the trouble of injector seals, are you sure the fuel smell is from up front? Perhaps it's just a dead O2 sensor (the ECU is supposed to let you know when they die, but in my experience, you won't get a MIL even when the O2 sensor is stuck at 0, which makes the car dump fuel like there's no tomorrow )?

 

[VBGSX]

There's supposed to be one line unconnected like that. If you look close on the charcoal canister, it should have "air" printed on it near that (or something like that, been awhile since I looked at mine).

Absolutely correct!
That one says "AIR" and is vented similiar to what you see. It actually will have a cap that snaps on but leaves about a 1/4" space so that it will vent. The cap is really just to prevent debris from going straight into the hole.


****edit****
Forgot to finish my post...
Like 1LE stated, you need to verify where the smell is coming from.
I was looking at your pics. Do you have an aftermarket exhaust, cat(or no cat) or downpipe? I also see that you have a ported head. Since obviously your manifold was off at one time, I would check for exhaust leaks at the mani/block, mani/turbo, turbo/O2 housing and the rest of the exhaust. Any exhaust leak before the cat could give you that kind of smell. If you don't have a cat, that could be the source also. But then again, even with a cat, it's not a guarante that you won't have the smell.

Just food for thought
I hope it helps

 

[steve-o_95_GST]

well i just ordered the seals because they probably havent been replaced since it rolled out of the plant and its probably a good idea. ive tried to rev the car up in nutral to try to see any leaks from the fuel rail, but i couldnt see or smell any. i have a afr gauge on the way and im going to order the narrowband to wideband converter for it to make it more acurate. but could you tell me or point me to a vfaq on how to test the o2 sensor, ive tried to find one but couldnt.

thanks alot, steve

 

[VBGSX]

well i just ordered the seals because they probably havent been replaced since it rolled out of the plant and its probably a good idea.

Yep, it's never a bad idea. When I replaced mine, they were so dried out, they were like hard plastic.

....i have a afr gauge on the way and im going to order the narrowband to wideband converter for it to make it more acurate. but could you tell me or point me to a vfaq on how to test the o2 sensor, ive tried to find one but couldnt.

thanks alot, steve

Most A/F guages are junk. They're just pretty blinky lights.

As far as testing the O2 sensor
1. Raise the car and support it securely on jackstands
2. Locate the oxygen sensor electrical connector and disconnect it.
3. Using an ohmmeter(multi meter), measure the resistance between the heater terminals of the sensor electrical connector. There should be continuity. If not, replace the sensor.
4. Locate the output terminals of the oxygen sensor. Connect a digital voltmeter to the terminals.
5. Start the engine and warm it up to normal operating temps. Check the oxygen sensor signal voltage.
...A. For the O2 sensor in the O2 housing. Voltage should range from 100 to 900 milivolts(0.1-0.9 volts) and switch actively between high and low readings.

This is pretty much word for word from the manual.

You can have a O2 sensor go bad and never throw a code. Mine went bad when I did a turbo swap and ported my O2 housing.

If you had a logger, you could use it to see if the O2 sensor was working properly.

Maybe someone else can verify this but maybe the local auto parts store(auto zone, advanced auto) can check it with their scanning tool(for free). I know it can test a lot of sensors. I'm just not sure if the O2 sensor is one of them.
It would be worth asking them.

Good luck

 

[steve-o_95_GST]

thanks for your help guys, i still have my factory exhaust with the cat, ill try to get it on the hoist at work and check the exhast for leaks, ill also use our obdII scanner to see if i can check the 02 sensor, if not ill get a hold of a multi meter to check it my self. ill keep you all posted on sat hopefully

-steve

 

[swarm]

I am leaking fuel from that area. WTF?

any help quickly please...

 

[steve-o_95_GST]

I am leaking fuel from that area. WTF?

any help quickly please...

what area, around the exhaust or the fuel rail?

-steve

 

[Korndogg]

if i were you i think i would replace that fuel filter. it's in pretty poor condition. what's all that corrosion? is the fuel filter/lines leaking there? i live in vt where everything corrodes, but my fuel filter looked a hell of a lot better than that when i changed it..
http://slowboyracing.com/shop.php?sid=&cat=89 only $25 dolla and a buncha bitchin, (pretty awkward spot - hard fuel line on the bottom. break it and you're SOL)

 

[kikkinbac]

Yeah i'm going with replacing the fuel filter while your into all that casue that thing looks like crap sorry but its just nasty

 

[swarm]

I'm spewing fuel from the area circled in the original pic.

i guess the charcoal canister is full? that's bad..

could it be because i'm running a 255 and no afpr?

 

[steve-o_95_GST]

are you sure its not from your fuel filter instead the canister? (the fuel filter is the cylinder at the very top of the pic)

 

[kikkinbac]

The fact that your leaking fuel from the charcoal canister is really odd. This is how that piece works. The tree huggers that were so worried about the enviroment. Were complaining about the gas and air mixture that might leak out after it is mixed and the car is shut off. There for not using the gas air mixture. This mixture is put in to the canister to sit so it is not vented to the enviroment. Then the computer waits till you are at a certain speed and a certain rpm set by the manufacturer. When you are at the certain point the computer says "ok open up the canister and put that stuff in the intake." Doing as the computer says it opens the canister and puts all that crap thats been sitting there into your intake to mix with your precious FRESH mixture and kinda messes it up. So if your driving down the road and your car has been running fine for the longest time. Then it has a second of that no balls feeling. Don't freak out it could just be the canister mixing in that old mixture or gas and air. Now that you know how it works you can see that it would be really odd and bad if you had physical fuel leaking out of that canister. The only way i could see that happening if if that hose has been off since way back when the car was just bought. It would then also have to have like a cajillion miles on it. That would also mean that the unused mixture would have to be kept from evaporating too. Which i don't see happening but in this hypothetical situation lets say it hasn't. It then could over time build up and turn into a liquid as the air escapes leaving the gas in the container. Then the gas could EVENTUALLY leak out.......*takes breather* ........ I would say look somewhere else for leak cause the canister only makes sense in odd dsm world. hope that helps and you learned something

 

[swarm]

it is definately that little place... it is very wet. it is not the fuel filter. i relocated the fuel filter when i replaced it due to his PITA location.... so it's not the filter.. it is very obvious that it is coming from the circled area...

So, kikkinbac... Lets say I have a walbro 255, unknown FP setting rightnow.. and lets say it's running reallyrich and stuff.. I have NO AFPR.. could i just be pumping so much fuel that it could fill that canister up? is there a drain hole or something?

 

[1LE]

So, kikkinbac... Lets say I have a walbro 255, unknown FP setting rightnow.. and lets say it's running reallyrich and stuff.. I have NO AFPR.. could i just be pumping so much fuel that it could fill that canister up? is there a drain hole or something?

I didn't have fuel coming out there and I had a Supra fuel pump (slightly bigger than a walbro 255) and a broken FPR that was dumping fuel to the point that eventually the car wouldn't even run. No fuel leaking out of the charcoal canister. The charcoal canister should only accumulate the fumes coming out of the tank. Should not see any difference with fuel pump/FPR. Only thing I could possibly imagine is that the gas tank was overfilled to the point that fuel was coming out there.

 

[kikkinbac]

You could put a aeromotive 1000 gph pump in your car and there should still not be gas coming out of that canister. Your car would have some serious issues like not running if you were pumping that much gas that it would fill that canister. Plus i can not come up with a way that that much fuel could physically get into the canister. If i was able to be there and look at your car i could come up with more but seeing as you live not where i am that's a little hard. All i can suggest is pull the canister dump it and see if the issue comes back a little down the road. Or you can start the car after you pull it and see if the fuel is coming from the hose that goes into the canister. Last but not least put some kinda bucket/drainpan under that area and turn it on. While its running get in there and look around for where it is leaking from thats all I can come up with. However again i can not come up with a way that that much fuel could physically get into that hose much less the canister. Sorry i know i did not give you a cut and dry answer but I hope that helps a little.

 

[swarm]

could it be a clogged return fuel line or something? it's still doing it... i sold the car and the new owner said it is leaking

any help would be appreciated

hey! if the gas tank vent is not working properly, and pressure is building up...could it force the fuel out of that canister? when the gas cap is removed, you can hear air escape.. "pssshhh"... just a thought.

 

[1LE]

hey! if the gas tank vent is not working properly, and pressure is building up...could it force the fuel out of that canister? when the gas cap is removed, you can hear air escape.. "pssshhh"... just a thought.

Gas tank is supposed to be pressurized. It should always "pssshhh" when you open it right after a drive.