Another clue to the puzzle of the Century

[JFrank]

Air filter soaked in gas

 

[korreckj328]

It's soaked in gas? Actually wet, or does it just reek of gas? I'd run a test on your fuel pressure to see if it's possible an injector is leaking if it just smells like gas, I don't think that would soak it.

 

[JFrank]

It's soaked in gas? Actually wet, or does it just reek of gas? I'd run a test on your fuel pressure to see if it's possible an injector is leaking if it just smells like gas, I don't think that would soak it.

Filter is very damp with gas

 

[korreckj328]

Wow. Well I'm not sure on that, I've only heard about them getting soaked like that on carbureted engines before. If it was me I'd probably still start by testing the fuel pressure and seeing if you have a leaky injector. Unless someone else has a better idea its at least a place to start.

 

[JFrank]

Wow. Well I'm not sure on that, I've only heard about them getting soaked like that on carbureted engines before. If it was me I'd probably still start by testing the fuel pressure and seeing if you have a leaky injector. Unless someone else has a better idea its at least a place to start.

Thanks for response Are we the only Century owners on this site? 🙄 Anyway ive been throwing some questions at duckduckgo .ai Seems to think it might be bad o2 sensor among other things

 

[chem_man]

Your air filter is located between the driver's side headlight and the throttle body - correct?

 

[JFrank]

Your air filter is located between the driver's side headlight and the throttle body - correct?

Yes

 

[chem_man]

I do not see how gasoline can get from the cylinders where the fuel injectors inject the fuel to the air filter. It would have to travel through the intake manifold runners, then the throttle body, through the air handling ductwork, the MAF and then into the air filter housing.

Wait a minute. I just checked an emissions diagram for the 2005 Buick Century. The vacuum line from the fuel pressure regulator goes into the EVAP canister purge valve AND the PCV hose also goes into the EVAP canister purge valve. Now, if the internal diaphragm on the fuel pressure regulator ruptures, then it might be possible for raw gasoline to be "forced" through the duct work and contaminate the air filter.

Pull the vacuum line off of the fuel pressure regulator and see if fuel runs out of the vacuum line. It it does, you need to replace the fuel pressure regulator. If it does not, take a 3 - 5 foot section of 3/16" vacuum line, attach one end to the fuel pressure regulator vacuum nipple and then stick the other end of the vacuum line in your mouth and gently suck. BE CAREFUL so you do not suck in liquid gasoline!!!! If you cannot create a vacuum that holds when you gently suck on the vacuum line, the fuel pressure regulator is toast and needs to be replaced.

 

[chem_man]

You can find diagrams, schematic, trouble shooting steps at charm.li It is a source of factory-like service manuals.

 

[JFrank]

I do not see how gasoline can get from the cylinders where the fuel injectors inject the fuel to the air filter. It would have to travel through the intake manifold runners, then the throttle body, through the air handling ductwork, the MAF and then into the air filter housing.

Wait a minute. I just checked an emissions diagram for the 2005 Buick Century. The vacuum line from the fuel pressure regulator goes into the EVAP canister purge valve AND the PCV hose also goes into the EVAP canister purge valve. Now, if the internal diaphragm on the fuel pressure regulator ruptures, then it might be possible for raw gasoline to be "forced" through the duct work and contaminate the air filter.

Pull the vacuum line off of the fuel pressure regulator and see if fuel runs out of the vacuum line. It it does, you need to replace the fuel pressure regulator. If it does not, take a 3 - 5 foot section of 3/16" vacuum line, attach one end to the fuel pressure regulator vacuum nipple and then stick the other end of the vacuum line in your mouth and gently suck. BE CAREFUL so you do not suck in liquid gasoline!!!! If you cannot create a

You can find diagrams, schematic, trouble shooting steps at charm.li It is a source of factory-like service manuals.

No gas come out it seemed like it wasnt creating vacuum

 

[JFrank]

You can find diagrams, schematic, trouble shooting steps at charm.li It is a source of factory-like service manuals.

Fuel pressure regulator

 

[chem_man]

Yes, the first picture is the fuel pressure regulator with the vacuum line coming off the top in the first picture.

In the second picture, that is the EVAP systems canister purge solenoid/valve.

You want to remove the hose from the top of the fuel pressure regulator (your first image. OK, I see where you have already done that. Good!

This is weird. Now the button to attach files and images is showing up on my end. Go figure!