Oilee needs some advice. By Bashan (Read 2,334 times)

[oilee]

rs1270.pbsrc.com/albums/jj610/hudsonlee/evaporativeemissioncontrolsystem_zps7e335cd1.jpg~c100?t=1400796771

[Bashan]

OK Oilee, I need some clarification. What is #1? (no smart answers mister!) Is that the vac fuel valve or what? #2 is the fuel line? #3 is the vapor canister?  Rich

Have you considered a career in something other than photojournalism?

[oilee]

Sorry about this , i have never used photobucket and im having a tough time getting photos on here.
Its all on my side here. Im not as good with computers as i should be.

So, the line right above your #1 is coming out of the purge control valve and i think that is suppose to go to the intake manifold but it was unhooked and tucked away hiding.
Now the gray hose above that one coming down from the top of the pic. going from left to right and then turning down and turns to a black hose goes directly in to the canister coming from the fuel tank, that is how the book shows it also.
#2 goes from the purge control valve to the air cleaner box.
#3 is indeed the canister.

[Bashan]

Here's one of your images Oilee:

That looks like a pretty standard setup on the diagram. I just don't see a check valve between the tank vent and canister, maybe because it's horizontal and they figure it would drain if there was a spill.

[Bashan]

OK, the red arrow points to your actual ACV valve. This looks like a 250 Helix setup, it's a 150 though correct?

[oilee]

It looks like to me that the engineers that designed this system should have spent there time doing something more constructive.

What are you gonna do.

My scoot is hooked up like the illustration except for the hose that goes to the intake manifold.
It is hooked up to the purge control valve but is routed over close to the carb and just tucked away and not hooked to anything.

My concern is the nipple on the intake manifold has a hose on it.
and it goes to the air cut off valve. i think its a vac line , is this correct?

[Bashan]

The difference with your vapor system is the purge valve isn't incorporated into the canister so it is located separately. It still does the same thing though, open the valve to let air flow from the canister to the air box. It takes one vac hose to open it, one hose off of the canister, and one to the air box. Did you secure that open vac hose? That is one big arse vac leak left open.

That ACV works the same as a conventional ACV, it reacts to vacuum and alters the mixture to prevent backfiring. It's just sitting away from the side of the carb but does the same function. What is your bike again? Did you tell us? I must have missed it. Rich

[oilee]

Yes, that is the carb i have.
the two open nipples on that acv i think are vac, am i correct?
The one facing to the right goes to my fuel petcock no prob there.
The one facing down, its connected to the nipple on the intake manifold on my scoot.
Is this correct? should i plug that up at each end ?

[Bashan]

Yes, connections on the intake manifold between the carb and head are a vacuum source. It is a direct inlet to the post carb intake system and absolutely needs to be plugged or hooked up to something. Sometimes there's one nipple, sometimes there's two, but they need to be secured. It will ruin performance if left open. Rich

[oilee]

Rich , i really appreciate you taking the time to work through this with me.
I'm just mechanical enough to get myself in trouble sometimes.
I sure like learning things about this scoot.

It's a 85 150 elite.

[Bashan]

The hose from the ACV to the side of the carb is an air inlet hose. One of the other is definitely a vac nipple, and probably the other as well. Let me go look downstairs in my shop....I'll be back.

[Bashan]

Yeah, they are both vac line nipples. One goes to the intake manifold but I don't know where the other one goes. Maybe it's a contiguous source for something else. The carb on my Fashion, which is a Helix clone, has one vac nipple on the ACV but the other one is closed so I can't tell you what it hooks to. The air inlet for the ACV on the Helix is underneath the ACV and I'm sure it is on your carb too. You'll see a little pipe pointing down. If you decide to remove the vapor system, run a vac source to the right side of the ACV, that's right as in sitting on the bike. The hose below that goes to the side of the carb. Go to auto weinie and get a set of vac caps, they're cheap, a couple bucks for 10 of them, and plug the other nipple. Plug the airbox, make sure all vac sources are hooked up or plugged. Put an old fuel filter on the tank vent hose and then crank it....see what it does. Rich

[oilee]

The acv on mine has two vac. hoses.
One goes to the intake manifold and the other goes to my gas tank petcock.
The petcock on my scoot has a vac hose connected to it, it works off of vac.
there is a valve on it that lets the fuel go to the carb once vac is applied.

I'll start unpluging, and plugging the system up and see if i see a difference.

Lee

[Bashan]

Then it is what I thought, the two vac nipples on the ACV are just simple connected and act as a Y connector. So run the vacuum source from the intake manifold to one of the nipples on the ACV valve. The other nipple on the ACV can simply be treated as another vac source for something else....like the petcock. What is the vac source for the purge valve? Rich

[Alleyoop]