What does the EVAP canister do?
EVAP Canister: The EVAP canister houses 1-2 pounds of activated charcoal that acts like a sponge by absorbing and storing fuel vapors until the purge valve opens and allows the vacuum of the engine intake to siphon the fuel vapors from the charcoal into the engine intake manifold.
Can a bad vapor canister cause rough idle?
Usually, when the purge valve is to blame for the rough idle, it will cause a vacuum leak which will impact the idle speed. If you have a vacuum leak that was brought on by a bad vapor canister purge valve, then you will probably have difficulties starting your vehicle.
What happens if the advance vacuum line is not working?
If the advance vacuum line is not working, the advance should stay reasonably steady — only changing with the revs. If this is the case, the distributor is definitely a dual advance (vacuum/centrifugal) operating like a 009 distributor (centrifugal only), and this would explain the hesitation you are still getting.
Where does the vacuum line go in a VW?
Let me make sure I have this straight: The MAIN vacuum line attaches to the port on the vacuum chamber at the rear (actually mine comes out of the side pointing toward the fuel pump, but that’s okay) and goes to the vacuum port on the left side of the carby under the stepped cam.
What do you need to know about a vacuum line?
List of common Vacuum controlled Devices: 1. Exhaust Gas Re-circulatory Valve ( EGR ) 2. Brake Booster 3. Exhaust By-pass Valves ( like those found on Ferrari’s ) 4. Pop up Headlights 5. Cruise control 6. Crank Case/ Valve Cover Vent 7. Heating / A/C Vent Controls
Can a bad canister cause a vacuum leak?
If this rpm is fluctuating, there is a good chance you are looking at an idling issue. Rough idling can be due to faulty spark plugs, carburetor problems, dirty fuel injectors, and a vacuum leak. A vacuum leak can occur as a result of a damaged or faulty EVAP canister or the hoses fixed to it.
Usually, when the purge valve is to blame for the rough idle, it will cause a vacuum leak which will impact the idle speed. If you have a vacuum leak that was brought on by a bad vapor canister purge valve, then you will probably have difficulties starting your vehicle.
Where are the vacuum lines on a Ford?
The 2 lines under the hood stick into holes in the grommet…and on the backside, there are 2 vacuum lines attached that run to the controls on the dash. All you should have to do is stick the line that has become detached back in the hole in the grommet.