Nic Posted March 30, 2006 Share Posted March 30, 2006 Only realised today when I was checking the epc, that the UK spec Supra has 2 x Oxygen Sensors (front and rear). I'm not as familiar with the UK Supra (as there are non over here), so why does it needs 2, when the J-specs only have a single O2 sensor? Answers on a post card please Link to comment Share on other sites More sharing options...
uk-rich Posted March 30, 2006 Share Posted March 30, 2006 because they are soooo fast Link to comment Share on other sites More sharing options...
SupraJames Posted March 30, 2006 Share Posted March 30, 2006 Not sure think one sensor is pre cat and the other is post cat, so maybe something to do with emissions..????? Link to comment Share on other sites More sharing options...
andrew7 Posted March 30, 2006 Share Posted March 30, 2006 Info from Lucas on twin sensors. There are two sensors fitted in the exhaust system, one located either side of the catalytic converter. The first sensor in the exhaust system is the regulating Lambda sensor. This sensor is also known as the pre cat sensor or the up stream sensor. The second sensor, which is located after the catalytic converter, is the diagnostic sensor, also known as the post cat sensor or the down stream sensor. These sensors were developed so the ECU can more accurately meter the fuelling of the engine.. Vehicle applications fitted with these types of sensors need a dedicated, direct fit replacement sensor, with the same technical specification as the one removed. Therefore universal Lambda sensors will not work properly on these types of engine management systems and should never be fitted. Link to comment Share on other sites More sharing options...
JohnA Posted March 30, 2006 Share Posted March 30, 2006 One sensor per dildo. Load balancing. Link to comment Share on other sites More sharing options...
SupraJames Posted March 31, 2006 Share Posted March 31, 2006 Not sure think one sensor is pre cat and the other is post cat, so maybe something to do with emissions..????? crikey I nearly got something right..!!! lol Link to comment Share on other sites More sharing options...
JohnA Posted March 31, 2006 Share Posted March 31, 2006 Since this in 'technical', just to clarify that the dildo balancing was a *joke* Link to comment Share on other sites More sharing options...
Nic Posted March 31, 2006 Author Share Posted March 31, 2006 Info from Lucas on twin sensors. There are two sensors fitted in the exhaust system, one located either side of the catalytic converter. The first sensor in the exhaust system is the regulating Lambda sensor. This sensor is also known as the pre cat sensor or the up stream sensor. The second sensor, which is located after the catalytic converter, is the diagnostic sensor, also known as the post cat sensor or the down stream sensor. These sensors were developed so the ECU can more accurately meter the fuelling of the engine.. Vehicle applications fitted with these types of sensors need a dedicated, direct fit replacement sensor, with the same technical specification as the one removed. Therefore universal Lambda sensors will not work properly on these types of engine management systems and should never be fitted. Thanks Andrew for the info, much appreciated. Link to comment Share on other sites More sharing options...
Paul Posted March 31, 2006 Share Posted March 31, 2006 because they are soooo fast Link to comment Share on other sites More sharing options...
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