Top 10 Symptoms Of Bad EVAP CANISTER

#canister #evap
In this video, we discuss the symptoms of a bad EVAP canister. The EVAP canister is a plastic container filled with activated charcoal that is connected to the fuel tank by a vent line. The main function of the EVAP canister is to capture and store fuel vapors from the fuel tank to prevent them from being released into the atmosphere.
The EVAP canister is usually located near the fuel tank behind the rear driver's side wheel. It's part of the EVAP that collects vapors and releases them into the engine to burn.
Symptoms of a Bad EVAP Canister
1) Check Engine Light
2) Strong Gasoline Odor
3) Poor Fuel Economy
4) Difficulty Starting the Engine
5) Rough Idle or Stalling
6) Failed Emissions Test
7) Vacuum Leaks
8) Hissing or Whistling Noises
9) Visible Fuel Leaks
10) Activated Gas Cap Warning Light
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--- Time Stamp --
00:00 Introduction
00:37 Symptoms of Bad EVAP Canister
00:41 Check Engine Light
00:57 Strong Gasoline Odor
01:18 Poor Fuel Economy
01:35 Hard Starting
01:55 Rough Idle or Stalling
02:14 Failed Emissions Test
02:32 Vacuum Leaks
02:51 Hissing or Whistling Noises
03:11 Visible Fuel Leaks
03:43 Activated Gas Cap Warning Light
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P0440
P0441
P0442
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P0455
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Disclaimer:
This video is for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.
Copyright Disclaimer:
Copyright Disclaimer Under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational, or personal use tips the balance in favor of fair use.
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[@norain31]

good simple to the point explanation

[@konstantinoskiprislis3192]

Hi, i think i have a problem with the evap system.. when i start the engine a whistling noise comes from the purge valve tube and it stops 2 to 3 seconds after i turn off the engine. I replaced the tubes with silicones hoses and nothing changed.. when i touch the silicone hoses i feel to much air passes from inside straight to the intake manifold.. what do you suggest?

[@MechanicalBoost]

The whistling noise from the purge valve tube and the air passing through the silicone hoses into the intake manifold suggest a possible issue with the purge valve or related components in the EVAP system. Here are some steps to diagnose and potentially resolve the issue:
1) Check the Purge Valve: The purge valve might be stuck open, allowing air to flow continuously. Remove and test the purge valve by applying voltage to it (typically 12V) and checking if it opens and closes properly. If it doesn’t function correctly, replace it.
2) Inspect for Leaks: Ensure there are no leaks in the hoses or connections. Even though you replaced the tubes, there might still be leaks at the connection points. Use a smoke test or spray soapy water on the connections while the engine is running to check for bubbles indicating a leak.
3) Check the EVAP Canister: The EVAP canister could be saturated with fuel vapors, causing the purge valve to operate improperly. Inspect the canister for any signs of damage or saturation and replace it if necessary.
4) Examine the Intake Manifold: Inspect the intake manifold for any signs of damage or leaks. An intake manifold leak can cause unusual air noises and affect engine performance.
5) Verify the Vacuum Lines: Ensure that all vacuum lines connected to the purge valve and intake manifold are correctly installed and not damaged.
If after these steps the issue persists, it might be helpful to consult a professional mechanic who can perform a more thorough diagnosis.

[@konstantinoskiprislis3192]

Thanks for your reply i will check it.. I supplied the valve and it opened.. i also mesured the purge valve's resistance and it is 35ohm.. when i start the engine it seems closed and i dont feel any air from the valve with my finger, after 5 minutes it starts a popping sound and air starts to pass through the valve.. maybe there is a leak to the connections as you said and create the whistling sound.. sometimes my car doesn't start on the first try and when it starts it feels poorly for the first 3 seconds.. i think maybe it cant keep fuel pressure or vapour when i turn it off and i am about to change the entire fuel pump which contains the fuel pressure regulator and the filter in the tank (there is no outside fuel filter)..

[@MechanicalBoost]

@@konstantinoskiprislis3192 I recommend to contact a professional mechanic before replacing your fuel pump