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I have installed a new vent valve solenoid and charcoal

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canister on a05 Tahoe and...
I have installed a new vent valve solenoid and charcoal canister on a05 Tahoe and still wont take fuel properly
Submitted: 2 years ago.Category: Chevy
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3/2/2016
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 28,328
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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Hello and welcome! My name is ***** ***** I can assist you with your question. Are there any codes in the computer? Have you smoked checked the evap system?

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Customer reply replied 2 years ago
have no way to smoke check no codes in computer
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Ok, how long ago were these new parts installed?

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Customer reply replied 2 years ago
is it 26 plus the 28 dollars
Customer reply replied 2 years ago
parts installed one week ago
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

It is only the one time fee unless you would like to speak on the phone.

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Have you checked the filler neck?

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Customer reply replied 2 years ago
no we will continue this way
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

ok

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Customer reply replied 2 years ago
for obstuctions ?
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

yes

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Customer reply replied 2 years ago
no I have not taken apart
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

That would be the next step. The reason being is because if the evap system were malfuntioning, then the check engine light would come on with an evap code. But since that is not happening, the evap system is working properly and then it is likley just to be an upstruction in the fuel filler neck.

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Customer reply replied 2 years ago
I just had my mechanic recheck the computer and does have code for large evap leak sory last week checked and no code but this week it was in computer but no light on
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Can I get the code number?

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Customer reply replied 2 years ago
po455
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Excellent! Does the vent valve operate when commanded on and off?

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Customer reply replied 2 years ago
ill check probably wont be till after lunch for answer
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Ok, a few other ways to diagnose this condition. Disconnect the large evap hose going to the canister (number 8 in the pic) and try filling up the fuel tank. If the problem remains, then the problem is before the canister and vent valve. If the problem goes away after removing this hose from the canister, then the problem is in or after the charcaol canister.

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

(1) EVAP Canister Purge Solenoid Valve
(2) EVAP Canister
(3) Fuel Fill Neck/Fill Cap
(4) Rollover Valve/Fuel Tank Pressure (FTP) Sensor
(5) Fuel Tank
(6) EVAP Canister Vent Solenoid Valve
(7) Vent Hose/Pipe
(8) EVAP Vapor Pipe
(9) EVAP Purge Pipe
(10) EVAP Service Port

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

I am glad I can help!

It has been a pleasure working with you. Please dont forget to honor your good faith deposit by rating my answer as "Excellent Service" for assisting you today.

Please let me know if you have any further questions.

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Customer reply replied 2 years ago
I ran a evap test on computer and came back po440
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Ok, then yes, the definition for this code is an evap malfunction. This is going to be related to the pump shutting off when getting gas. Chances are there is a restriction somewhere in the system.

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

.

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Customer reply replied 2 years ago
btw it also says that vent solenoid is venting on the computer
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

I do believe this means that the vent solenoid is open. This is a normal condition. IT should be open until the computer commands it closed.

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Customer reply replied 2 years ago
I pulled vent hose from tank to canister still did noy take fuel properly what next please
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

Ok, then the next step would be to remove the fuel filler neck and drop the fuel tank to look for obstructions. The problem is either going to be in/on top of the tank, fuel filler neck or the or the hose from the tank to the canister.

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Customer reply replied 2 years ago
I cant see it being the hose from the canister if it still does it when I disconnected it to the canister?
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 2 years ago

There could be a restriction in the hose between the tank and the canister. The only way to know for sure is to remove this hose from the tank completly and then try to fill it up again

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