O2 sensors
#1
02-15-2011 | 02:46 PM
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TReK
Joined: Sep 2010
Posts: 2,073
Likes: 6
From: Ketchikan, Alaska, USA
O2 sensors
I pulled this from an earlier post.
Is the $50 NGK O2 sensor on amazon http://www.amazon.com/gp/product/B001PNG622/ref=ord_cart_shr?ie=UTF8&m=A139T64LTDCRO8
the correct type of O2 sensor?
Location - just forward and aft of each cat on the exhaust down-pipe.
The following is for GEMS EFI 1996 - 1999 (early) and I copied this from a LR tech. bulletin:
The most common sensor used is zirconium based and generates a voltage of between .01 up to 1 volt based on the difference between the oxygen in the exhaust stream and that of the atmosphere.
Land Rover vehicles use a titania based sensor that operates differently. Instead of producing a voltage, the sensor changes resistance in response to oxygen in the exhaust. A rich mixture creates a low resistance in the sensor and vice versa.
A five volt reference signal is supplied to the sensor. In the case of a rich mixture, the low resistance in the sensor "pulls" the voltage low. Conversely, a lean (high oxygen content); mixture will cause the sensor to have high resistance and a high voltage. The typical range on a GEMS equipped vehicle is between less than 1 volt to more than 4 volts.
The following is for GEMS EFI 1996 - 1999 (early) and I copied this from a LR tech. bulletin:
The most common sensor used is zirconium based and generates a voltage of between .01 up to 1 volt based on the difference between the oxygen in the exhaust stream and that of the atmosphere.
Land Rover vehicles use a titania based sensor that operates differently. Instead of producing a voltage, the sensor changes resistance in response to oxygen in the exhaust. A rich mixture creates a low resistance in the sensor and vice versa.
A five volt reference signal is supplied to the sensor. In the case of a rich mixture, the low resistance in the sensor "pulls" the voltage low. Conversely, a lean (high oxygen content); mixture will cause the sensor to have high resistance and a high voltage. The typical range on a GEMS equipped vehicle is between less than 1 volt to more than 4 volts.
the correct type of O2 sensor?
#2
02-15-2011 | 02:50 PM
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TReK
Joined: Sep 2010
Posts: 2,073
Likes: 6
From: Ketchikan, Alaska, USA
Here is what NGK's website says regarding that O2 sensor.
4 WireNon-Flanged OE Identical Titania Oxygen Sensor, Direct Plug In, No Cutting or Splicing Required For Installation. Wire Length: 520mm/20.47in.
NGK also states these are for AELS systems. The non-AELS system O2 sensors are NGK 25017...
So I assume it is correct?
4 WireNon-Flanged OE Identical Titania Oxygen Sensor, Direct Plug In, No Cutting or Splicing Required For Installation. Wire Length: 520mm/20.47in.
NGK also states these are for AELS systems. The non-AELS system O2 sensors are NGK 25017...
So I assume it is correct?
Last edited by Chris-bob; 02-15-2011 at 02:55 PM.
#8
02-17-2011 | 03:30 PM
the sensors were ordered monday and came in today's mail. "NTK" packaging part #25044. The wiring harness is exactly the same as the old sensors ....only about a inch shorter...which wont be a problem. The price was $100.01 for two sensors with shipping. I'll install them, weather permitting ,tomorrow..these should be the real deal though.
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