CEL Code 1450, can't find the issue, help

[ArcticAthlon]

New to this forum, so go easy on me

OK so my CEL came on on my New to me 2005 Expedition EB. "Unable to Bleed Up Fuel Tank Vacuum" is description, and i can validate that there is a vacuum issue, because i can only fill up my tank half way before it clicks off. i can restart the fuel flow and get another 2 gallons, before it clicks and, then it just keeps clicking off. so there is a restriction somewhere.

Here is what i have checked so far:
1. Removed the Fuel Vapor Canister and checked for airflow. Airflow is fine, no charcoal issues.
2. Removed the Vapor Solenoid and it is always open and when i apply 12V, it closes. that is how it is supposed to behave, and so it works as well.
3. i removed and check the vapor purge valve and checked it as well. when applying voltage it worked as well. (dont remember if it was open and then closed with 12v or other way around)

What else can be blocking the fuel vapors from properly venting?

Also, what is the best repair/maintenance book to buy for these cars. i would prefer one that is more specific for my model year, instead of a Chilton that covers 20 sub models in one book.

Thanks

 

[stamp11127]

Ford Factory Service Manual.

It will give the proper steps in troubleshooting your problem and how to check that and other issues that arise.

 

[bedrck46]

sent you a PM

 

[bedrck46]

sent you a PM

 

[bedrck46]

The following was copied from the 2005 Ford service manual

P1450 - Unable to Bleed Up Fuel Tank Vacuum

Description: Monitors the fuel vapor vacuum and pressure in the fuel tank. System failure occurs when the EVAP running loss monitor detects excessive fuel tank vacuum with the engine running (but not at idle).

Possible Causes:
Blockages or kinks in the EVAP canister tube or EVAP canister purge outlet tube (between the fuel tank, EVAP the canister purge valve and the EVAP canister).
Fuel filler cap stuck closed (no vacuum relief).
Contaminated fuel vapor elbow on the EVAP canister.
Restricted EVAP canister.
CV solenoid stuck open (partially or fully).
Plugged CV solenoid filter.
EVAP canister purge valve stuck open.
VREF circuit open (harness near the fuel tank pressure [FTP] sensor, the FTP sensor or the powertrain control module [PCM]).
Damaged FTP sensor.

Diagnostic Aids:
Visually inspect the EVAP canister inlet port, CV solenoid filter, and canister vent hose assembly for contamination or debris.
Check EVAP canister purge valve for vacuum leak.

 

[ArcticAthlon]

Ford Factory Service Manual.

It will give the proper steps in troubleshooting your problem and how to check that and other issues that arise.

Thanks for the advice, i guess i will scour ebay and amazon for the manual.

I do have a suspicion when it comes to my issues. wondering what others think.

I have a non OEM gas cap in the Expedition, and it does not click when you twist it. however, it does say on the cap to turn it until it clicks. this makes me think that the system could hold vacuum and possibly be the issue. Will probably get a new one to see if that fixes it.

I am also stuck as to where this one hose is supposed to connect. It was never connected to anything, and i think it is my vent to atmosphere hose, but there is no place for it to connect too. there is a hole right next to my gas fill cap, but no grommet is there.

Can someone else tell me if there is supposed to be a plastic connector that this vent valve is supposed to connect too?? i took some pictures to show what i mean.

 

[bedrck46]

you will only find the manual that I suggested on e-bay

 

[ArcticAthlon]

I ended up getting a new Motorcraft gas cap, and that did not clear the CEL, as it came back after a few hours of driving. Also I have been scouring the ford service manual, and it shows pictures of EVAP system and the hoses. It does not tell me where the hose, that I am confused by, goes. It is called a "Fuel Vapor Hose" and is item number 5 on the diagram above.

I just don't know where it can go. The hose it too short to reach the fuel tank, and really only reaches up to the fuel tank filler neck. there are NO ports on it for it to connect.

Can anyone check and see if they have a different fuel filler neck, and possibly locate where this hose connects too?

Thanks for the help.

 

[ArcticAthlon]

It turned out to be the Fuel Vapor pressure sensor. had to drop the fuel tank and get the part replaced. Cost was $600 for part and labor.

 

[bedrck46]

Thanks for the update
I take it you didn't do the work yourself

 

[ArcticAthlon]

Thanks for the update
I take it you didn't do the work yourself

I did all the troubleshooting steps that did not require dropping the fuel tank (7 out of 9 steps). I would have liked to done all the work myself, but I just adopted a baby. I don't have the amount of time to work on vehicles as I used to, and I can't have a ripped apart Kid mobile that sits in the driveway while i am at work. I try to find out what i can, and do as much troubleshooting myself.

 

[bedrck46]

totally understand
Just was curious as I need to drop my tank to change the fuel pump You gave me an idea of how much I save by doing the work myself

 

[BigDaddy]

I have the P1450 code right now in my '01 4.6. No CEL, just stumbling on acceleration which I attributed to a bad COP until I had the codes run. COP is a 5 minute fix for me, but I'm not sure how to handle this one. This sucks because I have a trip to Chincoteague, VA this week (6 hours each way) and need to use it.

Other than the stumbling on acceleration, am I doing any damage to the system if I would run it for a few hundred miles before getting the work done?

 

[bedrck46]

P1450 - Unable to Bleed Up Fuel Tank Vacuum

Monitors the fuel vapor vacuum and pressure in the fuel tank. The system failure occurs when the EVAP running loss monitor detects excessive fuel tank vacuum with the engine running (but not at idle).

Blockages or kinks in EVAP canister tube or EVAP canister purge outlet tube (between fuel tank, EVAP canister purge valve and EVAP canister)
Fuel filler cap stuck closed (no vacuum relief)
Contaminated fuel vapor elbow on EVAP canister
Restricted EVAP canister
CV solenoid stuck open (partially or fully)
Plugged CV solenoid filter
EVAP canister purge valve stuck open
VREF circuit open (harness near FTP sensor, FTP sensor or PCM)
Damaged FTP sensor

 

[BigDaddy]

P1450 - Unable to Bleed Up Fuel Tank Vacuum

Monitors the fuel vapor vacuum and pressure in the fuel tank. The system failure occurs when the EVAP running loss monitor detects excessive fuel tank vacuum with the engine running (but not at idle).

Blockages or kinks in EVAP canister tube or EVAP canister purge outlet tube (between fuel tank, EVAP canister purge valve and EVAP canister)
Fuel filler cap stuck closed (no vacuum relief)
Contaminated fuel vapor elbow on EVAP canister
Restricted EVAP canister
CV solenoid stuck open (partially or fully)
Plugged CV solenoid filter
EVAP canister purge valve stuck open
VREF circuit open (harness near FTP sensor, FTP sensor or PCM)
Damaged FTP sensor

Thanks. I already had all of that info. I also have 3 10 hour workdays until I leave for my trip which is why I said that I'm not sure what to do at this point. I'll grab a new gas cap from the dealer first.

 

[bedrck46]

keep the forum updated it may help others