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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Oxygen sensor placement
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Sun, 24 July 2005 20:16
 
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| LeZZa wrote on Mon, 25 July 2005 02:41 |
So how to do you tell if your sensor is heated or not? The engine i'm about to get the exhaust done for is a 4agze.
What is the theory behind having a heated sensor?
| oldcorollas wrote on Sat, 23 July 2005 00:05O2 |
sensor is for cruise only.
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So the O2 sensor doesn't work all the time to fine tune the amount of petrol injected...?
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yup, 3 or 4 wires is heated.
theory is it has a heater so it stays hot, rather than ONLY being heated by the exahust gas (they need to be hot to be accurate, or to work at all...)
at cruise/idle, if the sensor is too far away it will get too cold.
nope, it will only (usually) affect mixtures when rpm is above a min, throttle is below a max, and absolute MAP is also below a max (ie when not loaded too much).
nonheated can have two wires also.. the second being the sensor ground wire, as opposed to grounding thru the exhaust pipe..
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