EVAP vent solenoid
 

Hello everyone, I have a 99 F250 v10 that I haven't owned for very long. My check engine light is on and I have pulled code p455-EVAP leak detected. While following the hose system looking for potential problems I found that the EVAP vent solenoid (located on the back of the EVAP canister) has what looks to be a very short piece of hose on it that doesn't go anywhere. I am wondering if this is supposed to be connected to something, or if there is supposed to be some sort of small filter on it. I haven't been able to find any useful diagrams or pictures of this.

That's the inlet hose to the vent solenoid. It's supposed to be open.

I have a repair manual covering 2000 Superduty F-250-550/Excursion/ F-53 Motorhome Chassis .

Here is what it says for error code p0455 at Evaporative Emission Diagnostics :

<table width="96%" border="1" rules="groups" cellspacing="0" cellpadding="3"><tbody><tr><td colspan="2">CHECK FOR DIAGNOSTIC TROUBLE CODE P0455 OR P1443</td></tr></tbody><tbody><tr valign="top"><td valign="top"></td><td valign="top">

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• Is DTC P0455 present?

https://www.motorcraftservice.com/pu...1706/arrow.gifYes GO to B2.

<table width="96%" border="1" rules="groups" cellspacing="0" cellpadding="3"><tbody><tr><td colspan="2">B2 VISUALLY CHECK FOR GROSS EVAP SYSTEM LEAKS </td></tr></tbody><tbody><tr valign="top"><td valign="top"></td><td valign="top">https://www.motorcraftservice.com/pu...B/876/box1.gifCheck for the presence of a fuel filler cap. Do not tighten or check for correct installation at this time.

</td></tr><tr valign="top"><td valign="top"></td><td valign="top">https://www.motorcraftservice.com/pu...B/880/box2.gifCheck the input port vacuum and EVAP return tube are connected to the EVAP canister purge valve.

</td></tr><tr valign="top"><td valign="top"></td><td valign="top">https://www.motorcraftservice.com/pu...B/884/box3.gifCheck that the canister vent solenoid is correctly attached to the EVAP canister.

</td></tr><tr valign="top"><td valign="top"></td><td valign="top">https://www.motorcraftservice.com/pu...B/888/box4.gifCheck for disconnected or cracked fuel vapor hoses or tubes between the intake manifold and following components:

• EVAP canister purge valve
• EVAP canister
• Fuel vapor vent valve assembly
• Fuel vapor control valve tube assembly

</td></tr><tr valign="top"><td valign="top"></td><td valign="top">https://www.motorcraftservice.com/pu...B/892/box5.gifCheck for damaged fuel tank or fuel filler pipe.

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• Is a concern with a hose, tube, connection or valve visually evident?

https://www.motorcraftservice.com/pu...1706/arrow.gifYes REPAIR or INSTALL new EVAP components as necessary.
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(This is a short version just to give you some problem areas to check).
Good luck,


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Thanks, hopefully I'll be able to figure his out.

Overdue update on how I fixed this incase someone runs across the same problem. The gasket on top of the fuel tank wasn't sealing properly. It was apparently getting worse, as I filled the tank one day and had gas running out from under the truck. I pulled the bed to see what was happening, used a rag and an air hose to slightly pressurize the tank and found the leak.