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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 08-14-2008, 10:45 PM   #1 (permalink)
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83 525e Oxygen sensor. Where?

Hi all, this is my first post so heres to a long stay

I have been through the manuls, been on the net... well I cant seem to find where the oxygen sensor is on my 525e. First reg 1982. As I cant seem to find it anywhere Im wondering is it actually pos that this one doesnt have one fitted and if so how is the air valve sensor getting its readings to adjust fuel flow to the injectors?

What Im wanting to do is to be able to manually adjust the fuel flow through the injectors to lean it out as I need.

I have this car running on hydrogen/petrol mix. Awesome stuff but need to lean it out to adjust for the amount of hydrogen its running on.

Any ideas would be greatfull.

Also I am am told that the sunroof winder is the same as the 318 manual winder? Is this right?

Thanks in advance.

Ashman
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Old 08-15-2008, 09:26 AM   #2 (permalink)
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All I can give you is a little logic from my motorcycling side. I find the O2 Sensors behind the headers at the collector. They never seem to be mounted at any individual exhaust port. Don't think you could miss it if it's there, because it will be the ONLY piece of kit sticking into the exhaust system from the collector backwards, with electrical wiring attached to it. Just a guess tho I'm sad to say.
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Old 08-16-2008, 09:06 PM   #3 (permalink)
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the thingie with electrical wires that sticks out of the manifold or exhaust pipe... that is your oxygen sensor.

you can alter the fuelflow by changing the resistance values on the wires ;-)I

YOU SAID: "... have this car running on hydrogen/petrol mix. Awesome stuff but need to lean it out to adjust for the amount of hydrogen its running on."

---you can't control the hydrogen by altering O2 sensor values. I'm sorry to say...

hydrogen has to be metered in a different way
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Old 08-18-2008, 03:48 PM   #4 (permalink)
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Hey thanks guys. Yea ive checked everywhere but no sensor. Im told it HAS to be there but no ...it isnt.
Yes the hydro works great but that is controled seperately. Wanting to use the sensor to control the mix as you say Darkhorse. But if I have no ox sensor how do I control the mix? is my next q
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