LupoL0ver Posted May 20, 2011 Report Share Posted May 20, 2011 Hi guysDoes a 51 plate 1.4 16v 100bhp sport have TWO cat's within the exhaust system?Thanks in advance. 1 Quote Link to comment Share on other sites More sharing options...
Big Jase Posted May 20, 2011 Report Share Posted May 20, 2011 If its like the gti it has a pre cat and full cat Quote Link to comment Share on other sites More sharing options...
Heyaxe Posted May 20, 2011 Report Share Posted May 20, 2011 Yeah the pre cat acts as a filter and is located where the branches marry up. It has a lambda sensor plugged into it. I am thinking of installing a 6n2 gti manifold as this does not have one, but i don't know what would happen if i unplug the sensor. Quote Link to comment Share on other sites More sharing options...
SamAtkinson Posted May 20, 2011 Report Share Posted May 20, 2011 Yeah the pre cat acts as a filter and is located where the branches marry up. It has a lambda sensor plugged into it. I am thinking of installing a 6n2 gti manifold as this does not have one, but i don't know what would happen if i unplug the sensor.Engine managment light, early sports only have one lambda sensor, which is located on the manifold. Quote Link to comment Share on other sites More sharing options...
LupoL0ver Posted May 20, 2011 Author Report Share Posted May 20, 2011 Thanks guys 2 piece it is. Quote Link to comment Share on other sites More sharing options...
Heyaxe Posted May 20, 2011 Report Share Posted May 20, 2011 Engine managment light, early sports only have one lambda sensor, which is located on the manifold. Does this put it in limp mode? Anyway to stop the light showing and have the lambda unplugged for the pre cat? Quote Link to comment Share on other sites More sharing options...
jon_273 Posted May 20, 2011 Report Share Posted May 20, 2011 Yeah the pre cat acts as a filter and is located where the branches marry up. It has a lambda sensor plugged into it. I am thinking of installing a 6n2 gti manifold as this does not have one, but i don't know what would happen if i unplug the sensor.Are you sure about that as the manifold on mine is off a 6N2 Polo GTI and it has a pre-cat. It's the same part number as a Lupo GTI one. Quote Link to comment Share on other sites More sharing options...
Heyaxe Posted May 20, 2011 Report Share Posted May 20, 2011 Am i missing something? This is a gti manifold from 6n2: Quote Link to comment Share on other sites More sharing options...
jon_273 Posted May 20, 2011 Report Share Posted May 20, 2011 Right OK, well the pre-cat is welded to the flange that bolts onto the bottom of that manifold.On your Sport is the pre cat above the flange? Are you planning to bolt your Lupo Sport downpipe to that GTI manifold? Quote Link to comment Share on other sites More sharing options...
Heyaxe Posted May 20, 2011 Report Share Posted May 20, 2011 (edited) Yeah i have a large cylinder where the branches join unlike that picture i showed you, and i am looking to install that to my downpipe. Does the GTI manifold use a lambda sensor too?I am after installing that 6n2 manifold to my 1.4 sport, is it a straight fit? Edited May 20, 2011 by Heyaxe Quote Link to comment Share on other sites More sharing options...
jon_273 Posted May 20, 2011 Report Share Posted May 20, 2011 The GTI manifold uses a lambda sensor, but it fits in the top of the pre cat (large cylinder) which you don't have.I think if you try and fit that manifold directly to your downpipe you will find it to be too short. I had thought the sport downpipe is shorter to compensate for the pre cat being part of the manifold. Conversely, the GTI has a longer downpipe which includes the pre cat, but the mani is shorter.I might be wrong though so you may as well give it a try, and then we'll know for sure. Quote Link to comment Share on other sites More sharing options...
Brammo Posted May 20, 2011 Report Share Posted May 20, 2011 Depends what engine. AUB has 2 cats. AFK has one cat AND no EGR. I wish I had an AFK engine. Quote Link to comment Share on other sites More sharing options...
SamAtkinson Posted May 21, 2011 Report Share Posted May 21, 2011 I have an AFK, wouldnt say it was better like. I did have that 6n2 manifold on my sport way back when and the car ran fine, fitted fine aswell. But again I only have one lambda. Quote Link to comment Share on other sites More sharing options...
Heyaxe Posted May 21, 2011 Report Share Posted May 21, 2011 I can only see one lamdba sensor on my car and that is connected to the branches, so on the GTI the sensor must be connected to the downpipe? What engine was your sport, and did it have the precat at the top or bottom of flange? Quote Link to comment Share on other sites More sharing options...
SamAtkinson Posted May 21, 2011 Report Share Posted May 21, 2011 The second lambda, assuming you have one is under the car after the cat Quote Link to comment Share on other sites More sharing options...
Heyaxe Posted May 21, 2011 Report Share Posted May 21, 2011 Ill have to jack the car up and have a good look at the mid section lol. But i have a hunch i only have one sensor.. Quote Link to comment Share on other sites More sharing options...
SamAtkinson Posted May 22, 2011 Report Share Posted May 22, 2011 The lambda sensor, the plug, will be shaped like a chocolate finger (the biscuit). Thats what mine is like. On the newer engine code, with the erg valve (you could also check to see if you have this come to think of it). Anyway if you have two lambda sensors you will have a squarer plug. Hope this helps in some way. Quote Link to comment Share on other sites More sharing options...
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