JustinL

My manifold will soon be off to replace the gaskets and with my aging hoses it's time to do a cleanup and replacement job. I have a guru kit on the way that includes a reliaboost, which should eliminate the cycling valve. I've also been reading that the fuel vent can be removed and all associated plumbing. Does anyone have a procedure for this, and do I need to buy a little filter for the hose? What effects does this have other than venting gasoline into mother nature?

Thanks,

Justin

silicondigital

I too want to remove all that crap over beside the brake booster. The fuel vent stuff i beleive your talking about. Is it OK to do? Anyone?

Rob

I got rid of all that on mine. I removed the control valves, associated vacuum lines, vent line to j-boot, and charcoal canister located behind the drivers inner fender well. I then plugged the j-boot and the line coming from the tank. I also drilled a small relief hole on the inside of the gas cap to allow the tank to breathe.

Rob

JustinL

Is there any concern for venting fuel vapour into a hot engine compartment? Or is there not enough fuel for this to cause concern?

Rob

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by JustinL:
<strong>Is there any concern for venting fuel vapour into a hot engine compartment? Or is there not enough fuel for this to cause concern?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">The way I removed mine, I don't vent to the engine compartment. I plugged the line coming from the fuel tank and then drilled the small hole on the inside of the gas cap to allow the tank to vent to the surroundings.

Rob

silicondigital

ohh, so all that thing is, is a vent that just cathes the vapor, condenses it then feeds it to the engine to get rid of it? sounds like a flower child version of a hole in the gas cap.

DangerIsland

silicon: man, you gotta think about the TREES, that 1/2oz of gas you might lose into the air is going to do some serious damage to the poor defenseless plants and animals. <img border="0" title="" alt="[Wink]" src="wink.gif" />

Can anyone else comment on the hole-in-the-gas-cap idea? It sure would be nice to remove all that extra plumbing and crap.

Rob

The system is for venting the fuel tank and capturing any vapors from the gasoline like silicondigital claimed. Before cars had charcoal canisters, they simply ran vented gas caps to allow the tanks to breathe as required. With the addition of a charcoal canister, these vapors are now captured and released into the intake system. With the addition of the vapor recovery system, cars started coming with sealded gas caps.

The way the system works is to evacuate the charcoal canister whenever the correct water temp has been reached and the throttle is open far enough. To do this a thermal vacuum switch located on the rear heater hose manifold and the lower throttle body vacuum port are used. The vacuum signal comes from the lower TB port through the thermal vacuum switch over to the control valves on the drivers side by the test port.

Rob

pikey7

We must be talking of the emmisions check system here. See if you can get hold of some info on Euro cars, as they Don't have on to start with!

Nicolas

Hello

Rob , did you removed the 2 lines:
- Plastic one coming to the booton of the canister
- Metallic one coming to the firewall

I understand that the plastic one is a vent so I put a small filter and the metallic one is a return line from canister to tank when there is no enough vaccum and/or the temp is too low ?
the return line is going to the filler neck and has one way valve on it near the filler ?
Am I right ?

I would like to remove the metallic one...all the other s..t is already in the trash...

Regards

Rob

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Nicolas:
Rob , did you removed the 2 lines:
- Plastic one coming to the booton of the canister
- Metallic one coming to the firewall
</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">I left the metal one coming up the back side of the firewall, but i did plug it. As for the plastic one coming off the bottom of the canister, I removed the whole canister.

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">
I understand that the plastic one is a vent so I put a small filter and the metallic one is a return line from canister to tank when there is no enough vaccum and/or the temp is too low ?
the return line is going to the filler neck and has one way valve on it near the filler ?
Am I right ?
</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Not quite. The whole system is just a venting system to allow the tank to "breathe" as needed. The charcoal canister is a filter that captures any fuel vapors leaving the tank. The control valves and line going to the j-boot basically take these captured vapors and introduce them into the intake system to be combusted. So the metal line coming from the tank is really just a venting line for the tank. I could have just removed it as well, but didn't feel it was worth the effort Instead, I just plugged it off. Since the vent line for the tank is now plugged, the tank now needs another way to breathe, thus the hole on the inside of the gas cap.

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">
I would like to remove the metallic one...all the other s..t is already in the trash...
</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">This shouldn't be a problem, but you will also need a small hole on the inside of your cap or some other method of venting the tank.

Rob

Rob

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by pikey7:
<strong>We must be talking of the emmisions check system here. See if you can get hold of some info on Euro cars, as they Don't have on to start with!</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Actually, the euro cars have these same systems installed on them as well. The reason may be to rid any fuel smells as the tank vents.

Rob

MooreBoost

Does this hole need to be drilled in the center and how "small" of a hole are we talking about? Can anyone give me the part number for a venting gas cap?

zerMATT951

This is what I did to my gas cap. I couldn't find a vented one, so this seemed like the simplist route...

MooreBoost

Cool thanks. has anyone who did this mod have any problem with vapor lock?