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Old 05-26-2019, 09:14 PM   #1
Funstuie
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Another “what is this” post from me

Hey all

Quick one. Doing some upgrades and clean up on the 76 c19 today I discovered that this canister is not connected to anything. The hose gonna to the engine is just hanging there not connected and the hose going down is split open next to the radiator. So with no fear of looking stupid my question is, what is it?

Thanks
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Old 05-26-2019, 09:19 PM   #2
jocko
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Re: Another “what is this” post from me

fuel vapor canister - part of emissions system.
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Old 05-26-2019, 09:20 PM   #3
Funstuie
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Re: Another “what is this” post from me

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fuel vapor canister
Thanks. Is it an issue not being connected to anything?
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Old 05-26-2019, 09:24 PM   #4
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Re: Another “what is this” post from me

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Thanks. Is it an issue not being connected to anything?
No, a lot of people take them out anyways. Cleans up the engine room. Odd place for it though. It usually mounted low, in the front of the engine room.
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Old 05-27-2019, 12:23 AM   #5
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Re: Another “what is this” post from me

Those are used to make fuel vapor get sucked into the engine and burned. The system uses a nonvented gas cap so one way or another, the tank is being vented if the system isn't working. It's pretty simple to make it work and has a purpose.
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Old 05-27-2019, 08:13 AM   #6
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Re: Another “what is this” post from me

If you opt to remove that, you will need to make sure your gas tank(s) get venting. Simply plugging the line to the tank will most likely create fuel flow problems. Plus plan on getting used to a gas smell as instead of being captured by the canister, the vent fumes will simply smell as they are released.

This thread has the no canister system: http://67-72chevytrucks.com/vboard/s...d.php?t=786794
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Old 05-27-2019, 09:10 AM   #7
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Re: Another “what is this” post from me

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No, a lot of people take them out anyways. Cleans up the engine room. Odd place for it though. It usually mounted low, in the front of the engine room.
That's where they are mounted on 6 cylinder trucks.Mine's in the same place.
mike.
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Old 05-27-2019, 10:04 AM   #8
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Re: Another “what is this” post from me

Good luck trying to register your truck in San Francisco with smog devices removed.

Just hook it up with good vacuum lines.
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Old 05-28-2019, 11:18 AM   #9
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Re: Another “what is this” post from me

Fuel vapor is a great “additive” to the combustion process-anything to enrich the flammability rate of your mixture is a good thing-the more complete the burn, the more (to a point) you can extend the lean limits to pick up slightly more fuel economy.
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Old 05-28-2019, 04:34 PM   #10
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Re: Another “what is this” post from me

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Originally Posted by WorkinLonghorn View Post
Good luck trying to register your truck in San Francisco with smog devices removed.

Just hook it up with good vacuum lines.
x2. You must be new to CA.

Make sure you hook it up to the right port on the carb...
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Old 05-30-2019, 02:15 AM   #11
Greasey Harley
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Re: Another “what is this” post from me

That is the best evap canister you could have.
Easiest one to hook up, and no extra crap.
Run the fuel tank vent(s) to one side, plug the other side into the big port on the front of your carb and VIOLA! No more stinky gas fumes.
Good stuff.
I would move it to the core support just in front of the steering box.

Last edited by Greasey Harley; 05-30-2019 at 02:22 AM.
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Old 05-30-2019, 02:34 AM   #12
Funstuie
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Re: Another “what is this” post from me

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Originally Posted by WorkinLonghorn View Post
Good luck trying to register your truck in San Francisco with smog devices removed.

Just hook it up with good vacuum lines.
This truck was smoged and registered in this condition. I haven’t removed anything it’s still in the engine bay just not connected to anything.

It won’t require a new smog till 2020. Maybe the law will be updated to exempt later 70’s vehicles (one can hope).

I can’t find where on the carb it should be connected though.

Last edited by Funstuie; 05-30-2019 at 02:45 AM.
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Old 05-30-2019, 08:11 PM   #13
Greasey Harley
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Re: Another “what is this” post from me

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...

I can’t find where on the carb it should be connected though.
How 'bout a photograph of that-there carburetor?
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Old 05-30-2019, 08:50 PM   #14
Funstuie
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Re: Another “what is this” post from me

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How 'bout a photograph of that-there carburetor?
Like this
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Old 05-30-2019, 08:51 PM   #15
Funstuie
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Re: Another “what is this” post from me

Stupid photos won’t rotate
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Old 05-30-2019, 10:30 PM   #16
Greasey Harley
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Re: Another “what is this” post from me

I would plug it in to that open port on the drivers side front, down by the idle screw.
I think that is a vent. (Somebody please correct me if I'm wrong)
Either way, It should live happily there.
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Old 05-30-2019, 10:39 PM   #17
Funstuie
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Re: Another “what is this” post from me

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Originally Posted by Greasey Harley View Post
I would plug it in to that open port on the drivers side front, down by the idle screw.
I think that is a vent. (Somebody please correct me if I'm wrong)
Either way, It should live happily there.
This one?
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Old 05-30-2019, 10:51 PM   #18
Greasey Harley
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Re: Another “what is this” post from me

just to the left of that circle
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Old 05-30-2019, 10:54 PM   #19
Funstuie
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Re: Another “what is this” post from me

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just to the left of that circle
Perfect. I see it now. Thanks.
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Old 05-30-2019, 10:55 PM   #20
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Re: Another “what is this” post from me

Happy to help
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