Clean O2 sensor without removing

[biomecanoid]

Hello,

I have an old Daihatsu Sirion 2006 with the 1krfe engine and would like to clean my O2 sensor since as far as I know it was never done and the car had bad mpg

I would like to do what is shown here in the video





Which is the correct vacuum line to spray carb cleaner in my case according to the below photos?






















If you need more or better quality photos let me know

I also know its better to remove and clean the sensor I have order the proper tool and still waiting

Thanks
Chris

 

[Furious]

You would probably be better off running a product known as Cataclean.

 

[LenZee]

If it is easy to access just replace it.

 

[GMBoy]

I have never heard of cleaning O2 sensors and actually you may harm them with chemicals. Just replace them if they're over say 80-100k old- they get lazy with age.

 

[biomecanoid]

You would probably be better off running a product known as Cataclean.

Yes I have already used additives you put in the fuel tank that clean catalytic converter, injectors and O2 sensors

 

[biomecanoid]

If it is easy to access just replace it.

Yes its easily accessible but it costs something like 150 euro + the simple tools needed so if I can clean it for 10-20 euros its preferable

 

[biomecanoid]

I have never heard of cleaning O2 sensors and actually you may harm them with chemicals. Just replace them if they're over say 80-100k old- they get lazy with age.

Yes you do clean the sensors with carb cleaner sprayed via the vacuum line or by removing the and letting them soak in gasoline for the night

 

[biomecanoid]

Can anyone please pinpoint the correct vacuum line to try this ?

 

[LenZee]

Yes its easily accessible but it costs something like 150 euro + the simple tools needed so if I can clean it for 10-20 euros its preferable

Cleaning it is better than nothing I suppose. But it will never be as good as new after cleaning.

 

[biomecanoid]

Cleaning it is better than nothing I suppose. But it will never be as good as new after cleaning.

Yes I do know that but i guess its worth the try. Can you pinpoint the correct line ?

 

[Dave9]

Any larger vac line that is not behind a one way check valve (so you feel vac when you pull it off with engine running) would work. For example the brake booster, or just take the intake snorkel off the throttle body and spray it in there, possibly spraying it around the interior of the throttle body and plate, also helping to clean the throttle body while you're at it.

If what you remove lets too much unmetered air in and the engine stalls, pick a smaller vac line. I don't expect it to work well because you'd mostly be cleaning the outer metal shell instead of the element in it.

 

[Egg_Head]

New sensor for your whip is $32, good lord man, just replace it.

 

[biomecanoid]

New sensor for your whip is $32, good lord man, just replace it.

Where did you find it for 32$ ? those are just the shipping cost coming from Japan lol and I believe I have 2 sensors

 

[biomecanoid]

Any larger vac line that is not behind a one way check valve (so you feel vac when you pull it off with engine running) would work. For example the brake booster, or just take the intake snorkel off the throttle body and spray it in there, possibly spraying it around the interior of the throttle body and plate, also helping to clean the throttle body while you're at it.

If what you remove lets too much unmetered air in and the engine stalls, pick a smaller vac line. I don't expect it to work well because you'd mostly be cleaning the outer metal shell instead of the element in it.

Thanks for the info can you possibly mark on the photos the lines to try ?

 

[Dave9]

Thanks for the info can you possibly mark on the photos the lines to try ?

Your picture orientations aren't the greatest but from what I can make out, these two alternatives look like the brake booster (left) and the throttle body (right), one or the other. I could be wrong about the right one being the throttle body.

Even though that's the best I can make out from the pics, this vehicle seems very crude to not even have a dual chamber master cylinder so only a single point fault for brakes, no redundancy of having front or rear still work if the other fails? Yikes, if so.

 

[biomecanoid]

Your picture orientations aren't the greatest but from what I can make out, these two alternatives look like the brake booster (left) and the throttle body (right), one or the other. I could be wrong about the right one being the throttle body.

Even though that's the best I can make out from the pics, this vehicle seems very crude to not even have a dual chamber master cylinder so only a single point fault for brakes? Yikes, if so.

View attachment 173483

Thanks I will take better/clearer photos tomorrow

 

[biomecanoid]

Your picture orientations aren't the greatest but from what I can make out, these two alternatives look like the brake booster (left) and the throttle body (right), one or the other. I could be wrong about the right one being the throttle body.

Even though that's the best I can make out from the pics, this vehicle seems very crude to not even have a dual chamber master cylinder so only a single point fault for brakes, no redundancy of having front or rear still work if the other fails? Yikes, if so.

View attachment 173483

Hello I did spray half a bottle of card cleaner down the vacuum hose with the throttle pressed down with something heavy and now the car is quieter at idle, I don't know if this is some sort of placebo effect but it sure feels better

The way I did it all alone was a bit sketchy so I will continue in a couple of days with the help of a friend inside the car

I guess I should buy a nice OBDII scanner so I rely on actual hard data instead sound, vibration and general feeling

 

[FastLane]

You are wasting money trying to save money. Just replace them if you think something is wrong with them. It might not be the O2 sensor that’s is causing bad mpg.

 

[biomecanoid]

You are wasting money trying to save money. Just replace them if you think something is wrong with them. It might not be the O2 sensor that’s is causing bad mpg.

And what is the alternative then ? What do you suggest ?