Vacuum line

[MadOgre]

The canister delivers vaporized fuel to the top port on the qaudjet which in turn condenses and turns back into liquid fuel which is used to drive down the road, INCREASING MPGs

For crying out loud guys! Its a pretty simple and effective system. That's why its laughable when guys remove the canister to improve performance or to get rid of emmissions junk, CAUSE IT DOES NEITHER LOL

 

[MadOgre]

Your not gonna die with out it but it does not benefit you in any way to remove it!

 

[Boone83K10]

straight from GM Service manual:

EVAPORATIVE EMISSION CONTROL SYSTEM (EECS)
GENERAL
All light duty emissions and some heavy duty emission
vehicles are equipped with a system designed to prevent
escape of fuel vapor to the atmosphere. Vapor generated by
evaporation of fuel in the tank, previously exhausted to
atmosphere, is transferred by an emission line to the engine
compartment. During periods of operation, vapors are fed
directly to the engine for consumption. During periods of
inoperation, an activated charcoal canister located in the
emission line stores any vapor generated for consumption
during the next period of operation (Figs. 6E1-80 and 81).
The amount of vapor drawn into the engine at any time
is too small to have any effect on fuel economy or engine
operation.


rant over now, I quit!

 

[MadOgre]

LOL EXACTLY

It may be too small to notice but removing it has no benefit.

 

[chengny]

The primary function of the evaporative emissions system is to capture and store any "diurnal losses" of vapor from the fuel system. However, a secondary function is to reclaim these stored vapors and burn them as usable fuel.

Diurnal losses are the quantity of fuel that escapes to the atmosphere - due to venting of excess vapor pressure.

The vapor pressure produced by a volatile liquid is mainly a function of ambient temperature and solar exposure. Consequently, the degree of diurnal losses tends to vary greatly depending on geographic location and seasonal conditions.

But in general, if not captured by an EVAP system (and also assuming the tank has a vented gas cap) the rate of diurnal losses from a car's gas tank were calculated by the EPA to be about 50 grams/day.

That number was obtained from tests conducted under warm/sunny weather conditions - I think they used Mobile, Alabama as a testing sight.

So:

50 X 365 days per year = 18250 grams

453 grams = 1 lb

18250 grams / 453 = 40 lbs of gas

1 gallon of gas = 6.5 lbs

40 lbs / 6.5 = 6.2 gallons

So, without an operational charcoal canister and associated plumbing, diurnal losses from a single gas tank would amount to something like 6.2 gallons per year.

 

[rich weyand]

So, round numbers, if you drive 10,000 miles per year at 10 mpg, that's 6.2 gallons out of a thousand. Your mileage might go to 10.062 mpg, assuming fuel injection. Without fuel injection, your mileage won't change, because the carb won't adjust it's settings to account for the little bit of extra fuel vapor in the incoming air.

(Of course, with fuel injection, you will also get better than 10 mpg, even with a K.)

 

[firebane]

And how effective is a "charcoal" canister after 40 years? We see how other things are affected like fuel filters and oil filters and even EGR ports. I would say after 40 years that charcoal canister really isn't doing much of a job anymore.

 

[MadOgre]

The point is it DOES NOTHING TO IMPROVE PERFORMANCE BY REMOVING IT

 

[chengny]

It does nothing to boost performance whether it is there or not. But it can be useful if left in place:

If you strip off all the hoses, release it from the bracket, unscrew the bottom, remove the guts and then set it back in the bracket upside down... Viola! You have a nice weatherproof container in the engine compartment.

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It's roomy enough that it can be used to store a few emergency items like:

A roll of electrical tape
A few common sized hose clamps
A 4-in-1 type screw driver
A knife
Small flashlight
A small bottle of 3-in 1 oil
A short handled ratchet and a few loose sockets
A pair of 426 Channellocks
A 6" Crescent Wrench
Some wire and assorted solderless connectors

Well maybe not all that stuff - but you get the idea.


I spelled "voila" wrong on purpose.

 

[MadOgre]

LMAO HAHAHA who's the ***** now lol

 

[MadOgre]

Im still lmao lol

 

[Shalpass]

Well the canister is coming out today...it's all about cleaning up the engine Bay

 

[highdesertrange]

mine failed and somehow dumped a crap load of charcoal into my carb. needless to say it didn't help fuel economy. highdesertranger

 

[Shalpass]

Vacuum

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Another vacuum hose question...one coming up through the firewall was taped with a bunch of wires.... the hose was already disconnected...also there was one that was connected to the rear end that was plugged off with a bolt... Any ideas on that as well?

 

[MadOgre]

You must be registered for see images attach

Another vacuum hose question...one coming up through the firewall was taped with a bunch of wires.... the hose was already disconnected...also there was one that was connected to the rear end that was plugged off with a bolt... Any ideas on that as well?

Ok the hose is the vacuum line used for the cruise control. Don't worry if its not hooked up. just wrap it up out of the way for later use and plug the end to prevent crap from entering the hose.

The wires im not sure about I think they are cruise related as well but not 100% sure