o2 sensor

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10-23-2007, 04:56 AM
mikedudley17

Quote:

Originally Posted by shapinoweno

hey mike, what do you mean the resistor mod made a huge diffrence?
right now our ait sensor is just siting there in the intake tube, it sometimes falls out and what not :D .
i have noticed that the car seems very slugish in low RPMS in first gear. will the resistor mod help this any?

i thought the resistor mod dident do anything and was just a scam

here you go this should get u started:

http://www.aveoclub.net/phpBB2/viewtopi ... hip+things
10-23-2007, 02:38 PM
exodus

Quote:

Originally Posted by Audacity Racing

First sensor doesn't mess with emissions... it controls closed loop combustion. get a new one!!!!!!!! :shock:

DO NOT USE THE FOULER TRICK!!!!!

But I like the preset fuel map! :oops:

Seriously, though... limp mode on on this car is more like awesome mode.

Yeah, I am planning on replacing it, I'm just lazy :?
10-23-2007, 05:02 PM
mikedudley17

Quote:

Seriously, though... limp mode on on this car is more like awesome mode.

please explain, as i do not know much about how the different sensors work.
10-23-2007, 07:38 PM
exodus

Quote:

Originally Posted by mikedudley17

Quote:

Seriously, though... limp mode on on this car is more like awesome mode.

please explain, as i do not know much about how the different sensors work.

First o2 sensor (in the exhaust manifold) is used by the ECU to determine how much fuel to use... so if there's a lot of o2 left in the exhaust, it knows it's running lean... if there's none, it's running rich... adjusts the amount of fuel being injected accordingly.

Second o2 sensor (after the cat) lets the computer know if the catalytic converter is working properly.

If the first one fails it falls back on a preset injection map, rather than "intelligently" injecting fuel.

If the second one fails, I believe it does the same thing.
10-23-2007, 08:13 PM
mikedudley17

so this preset map is adding more fuel then cus it doesnt really know what to do?
10-23-2007, 08:23 PM
ontarian_frog

Quote:

Originally Posted by mikedudley17

so this preset map is adding more fuel then cus it doesnt really know what to do?

Yup just to be safe. That's why engines are a lot less efficient when one of the o2 sensors is out.
10-23-2007, 08:28 PM
mikedudley17

hhhmmm well in that case i would say just leave it broke lol. but unfortunatley emissions will get ya.
10-23-2007, 11:13 PM
exodus

trips a CEL. CEL in Va is instafail on inspection =/
10-23-2007, 11:38 PM
gonzokidd

I went to Quartermaster Corps MOS/AIT Training in Va. Its a beautiful place.

Unfortunately this training informed us to replace any/all sensors (etc, etc, etc) if broken. (I guess its what you expect to hear when your job is spending Tax-payer's money on auto parts and MREs, but really its not a bad gig...)

It'd probably be better to just get the new one.....Is there any way to program an O2 sensor or the car's computer? If you could, maybe you could program the computer to try and take in more air and less fuel?

Sorry I'm not much help, but I hope you are able to trick and sensor and pass emissions! YAY! :)

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