Usually, it is not essential in the function of the engine. It serves more of an environmental protection purpose and has as slight use in improving fuel mileage. Without the canister, the fuel system can vent some fuel vapors directly to atmosphere (not very enviro-friendly and wasting fuel) instead of storing them for reintroduction into the fuel system.
If you included the kind of car you have,I could be more specific but all cars have a vacuum canister under the hood. some are round plastic and some are a tin can and most are black. There shuold be a vacuum line going from the intake to one end and a vacuum line out of the other that supplies vacuum to the interior of the car, There should be a one way valve in the canister or the line from the intake. This valve is not functioning and loosing vacuum in the resirvoir. If it is in the resirvoir which most are, replace the resirvoir.
The purge canister is that black can in the front of cars and has wires and vacuum lines going to it, It is filled with charcoal.You just have to find out what is wrong. Start by checking the connections and vacuum lines and solonoid.
fuel system or evap? they are both near the intake, fuel is on the fuel rail going to the injectors and evap is on one of the vacuum lines that travel from the intake to the evap canister, it has a tag on it and a green cap.
The brakes need to be bled, or is there no vacuum pressure? in that case you need to check all vacuum lines, including the ones for the cabin and other accessories, not just the brakes.
The pool pump is most likely losing the vacuum due to clogged up filters. The filters need to be checked and cleaned.
Some canister vacuums are suction vacuums. These canister vacuums do not need electricity.
There is no vacuum canister on this vehicle.
"The benefits of purchasing a Miele canister vacuum versus a Miele upright is that the canister vacuum, for one, is quieter than an upright. Also, the canister vacuum comes with attachments that allow you to get into tighter place than the upright. If you have stairs, it's easier to maneuver the canister vacuum, and it's also smaller than the upright. It's also easier to clean car interiors with a canister versus and upright. And the tools and attachments that come with a canister are stored inside the canister. However, with an upright vacuum you don't have to constantly move it around. Uprights also have more suction power than a canister vacuum."
A central vacuum system eliminates the need to use a cumbersome upright, canister or bagless vacuum. Central vacuums are designed to suck dirt and debris through a hose located in the walls and collect it in an out of the way canister.
When the vehicle is under acceleration it doesn't supply vacuum. The vacuum canister or reservoir holds a vacuum supply to operate vacuum operated accessories until the engine regains vacuum.
An upright vacuum usually cleans carpets better, but a canister vacuum is better with liquids or heavy debris.
Bag vacuum cleaners require a bag and this is what catches the dirt that you vacuum up, when the bag gets full, you simply throw it away and replace it. Canister vacuums suck up the dirt into the canister attached to the vacuum. You then detach the canister and dump the dirt out of the canister.
The Miele S7260 is regarded by most professionals to be the best canister vacuum for pet hair.
"There are different models of the canister vacuum that Overstock offers, and the prices of each model varies. The average price for a canister vacuum from Overstock is between $45 and $500, although the often run good sales where you can get a $500 vacuum for under $300."
The only kind of vacuum canister that a Dyson vacuum machine will take is one that is made by Dyson. These canisters are made especially for Dyson, and to date there are no competitors in the market.
A Miele canister vacuum will last 30 years if you follow the proper maintenance procedures. If you change the filters and vacuum bags, then they work great.
Amazon sells the Miele Olympus Canister Vacuum for two hundred ninety-nine dollars and free shipping. Amazon sells the Miele Titan Canister Vacuum for five hundred ninety-nine dollars.