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Location:
qld
Registered:
May 2003
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Air/fuel Ratio Sensor
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Wed, 31 August 2005 10:59
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I am getting a wolf 3d v3 computer and was wondering if you can wire, the 4 wire type of sensor is wirable to the wolf, is there 4 wires which have to go to the computer??
Jason
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Air/fuel Ratio Sensor
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Wed, 31 August 2005 11:42
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only 1 wire goes to the ECU (i think). the others are the signal earth (maybe ECU earth), and then power and diferent earth for the heater
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Wed, 31 August 2005 11:54
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So what are the 4 wire one's and all the wire's do
1) Earth
2) ECU Wire
3)
4)
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Air/fuel Ratio Sensor
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Wed, 31 August 2005 12:16
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| ta2272 wrote on Wed, 31 August 2005 21:54 |
So what are the 4 wire one's and all the wire's do
1) SIGNAL Earth needs to be clean w/r ECU
2) ECU Wire
3) switched power from IGN? i used fuel pump power.. takes up to 5A when cold, 1A when hot
4) heater earth, just needs to be away from ECU earth and capable of 5 amps.
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heater wiring needs to be capable of 5 amps. and make sure it is switched
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Wed, 31 August 2005 13:40
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ah k, seems like a bit of effort to get all that wired, what is the benifit over a single wire sensor?
Jason
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Location:
Sydney
Registered:
November 2003
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Air/fuel Ratio Sensor
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Wed, 31 August 2005 15:36
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| ta2272 wrote on Wed, 31 August 2005 23:40 |
ah k, seems like a bit of effort to get all that wired, what is the benifit over a single wire sensor?
Jason
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sensor heats up in about 30 seconds or so, doesn't cool down during idle, is always up to temperature.... stays cleaner perhaps?
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Location:
qld
Registered:
May 2003
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 01:21
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The sensor has to be at a particular temperature to work properly, the heated one stays at this temperature, the single wire one relies on exhaust temp, so it's temp, and thus accuracy varies.
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 03:40
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so the difference between the 3-4 wire units is on the 3 it uses the 1 earth comapared to the 2 earths???\
Jason
also is it a bad idea to use a second hand one of these from the wrecker's?
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Location:
sydney
Registered:
March 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 03:43
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why do u need the o2 sensor connected anyway
it will just be innacurate most probably
and u cant use it for tuning
most cheap air fuel ratio meters a fukt anyway they either show very righ or very lean
i would never use anyhting like that cause they are innacurate
and a big wank
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 04:46
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yes sorry for being so stupid, thought i did ask one question, which is in my post above
so the difference between the 3-4 wire units is on the 3 it uses the 1 earth comapared to the 2 earths?
the one earth earths
SIGNAL EARTH
HEATER EARTH
thanks for your patience
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 04:58
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sorry 
3 wire has the SIGNAL EARTH going thru the body of the sensor, then thru the exhaust, then block, then earth strap then body, then ECU earth...
4 wire has SIGNAL EARTH going to ECU earth
the latter is better 
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 05:23
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well i will order a 3 wire one as i know that i can deff wire it up to the wolf 3d v3 as i am unsure if it is possible with the 4 wire one
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Location:
Brisbane
Registered:
July 2005
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 06:00
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The cleaner your ECU earth is to the ECU the better, hence you being told 4 wires better than 3. You are running signal from the sensor to the ECU anyway. Why so hard to run an extra wire with it and have a direct sensor earth to the ECU? The Wolf unit must have an earth somewhere...
Get the four wire sensor.
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 06:20
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| sideshow wrote on Thu, 01 September 2005 13:43 |
why do u need the o2 sensor connected anyway
it will just be innacurate most probably
and u cant use it for tuning
most cheap air fuel ratio meters a fukt anyway they either show very righ or very lean
i would never use anyhting like that cause they are innacurate
and a big wank
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exactly!100% correct.
mick
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 06:38
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well they ony had 3 wire ones in stock at moy exhaust shop so i grabbed one of those, were abouts does it need to be mounted??
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Location:
Launceston
Registered:
February 2004
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Location:
qld
Registered:
May 2003
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 13:21
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what if it is one of the heated type sensor does it still have to be up close in the system?
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Location:
Launceston
Registered:
February 2004
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Re: Air/fuel Ratio Sensor
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Thu, 01 September 2005 22:31
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the the closer to the engine the hotter it will get the more accurate it will be.
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