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AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 25853
Experience:  ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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I have installed a new vent valve solenoid and charcoal

Customer Question

I have installed a new vent valve solenoid and charcoal canister on a05 Tahoe and still wont take fuel properly
Submitted: 1 year ago.
Category: Chevy
Expert:  AMEDEE replied 1 year ago.

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?

Customer: replied 1 year ago.
have no way to smoke check no codes in computer
Expert:  AMEDEE replied 1 year ago.

Ok, how long ago were these new parts installed?

Customer: replied 1 year ago.
is it 26 plus the 28 dollars
Customer: replied 1 year ago.
parts installed one week ago
Expert:  AMEDEE replied 1 year ago.

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

Expert:  AMEDEE replied 1 year ago.

Have you checked the filler neck?

Customer: replied 1 year ago.
no we will continue this way
Expert:  AMEDEE replied 1 year ago.

ok

Customer: replied 1 year ago.
for obstuctions ?
Expert:  AMEDEE replied 1 year ago.

yes

Customer: replied 1 year ago.
no I have not taken apart
Expert:  AMEDEE replied 1 year 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.

Customer: replied 1 year 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
Expert:  AMEDEE replied 1 year ago.

Can I get the code number?

Customer: replied 1 year ago.
po455
Expert:  AMEDEE replied 1 year ago.

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

Customer: replied 1 year ago.
ill check probably wont be till after lunch for answer
Expert:  AMEDEE replied 1 year 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.

Expert:  AMEDEE replied 1 year 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

Expert:  AMEDEE replied 1 year 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.

Customer: replied 1 year ago.
I ran a evap test on computer and came back po440
Expert:  AMEDEE replied 1 year 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.

Expert:  AMEDEE replied 1 year ago.

.

Customer: replied 1 year ago.
btw it also says that vent solenoid is venting on the computer
Expert:  AMEDEE replied 1 year 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.

Customer: replied 1 year ago.
I pulled vent hose from tank to canister still did noy take fuel properly what next please
Expert:  AMEDEE replied 1 year 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.

Customer: replied 1 year ago.
I cant see it being the hose from the canister if it still does it when I disconnected it to the canister?
Expert:  AMEDEE replied 1 year 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