how bypass the catalyst on 2 lambda VTS

[martinm10]

Hy all, I have question how to put out my catalyst on EURO 3 VTS with 2 lambda sensors? Is any kind how to outwit the ECU?

[trickyd]

Mine has 2 probes (2001 Model) and I've had a de-cat on since i bought it. No problems, not even an ECU light

[KOTL_VTS16]

I have a buddy that has had no problem what so ever with his de-cat VTS 2001.

[saxorulez]

So If i have some problems with my cat (banging while changing the gears - probably these are his last days) I can get rid of it easly and there'll be no problem with the Check Engine light? I've a 2001 Saxo VTS and I think there are 2 lambdas in it.

[SaxoAL]

try it and see matey. there are little glove things that go over the sensor itself to fool it into thinking the exhaust emmissions are ok, but I cannot rememeber where you can get them from off hand

[citrovts]

you can buy the lambda sleevs from GMCMOTORSPORT in scotland

gmc (http://www.gmcmotorsport.co.uk)

[SaxoAL]

There you have it !

[saxorulez]

Well Scotland smileys/happy.gif It's quite far from me smileys/smiley19.gif Maybe you know what are they made of so I could do something like that in here?

[Scott]

they would probably deliver to you

[sevenfourate]

£21 delivered.Lamda from top of manifold (or FIRST Lamda)goes into bottom of new manifold/de-cat pipe and the one that WAS under car (second Lambda) fits into GMC sleeve.

No more EML problems smileys/happy.gif

Worked for me.........

[saxorulez]

But is it resonable to cut out cat in a serial exhaust? Cause I have a used one for only Ł17 so maybe its better to have in this situation? smileys/smiley5.gif

[sevenfourate]

Cat is for immisions regulations over here in the UK saxorulez.We need one to be road-legal if the car was manufactured after 1992 smileys/sad.gif

I dare say they keep the noise down,improve immisions and improve fuel consuption(all trade-offs of a standard car manufacturer's aims and intentions).However they also "rob" the car of a few horsepower.

Take it out ! smileys/happy.gif

[saxorulez]

We need one to be road-legal if the car was manufactured after 1992 smileys/sad.gif


Same in Poland smileys/happy.gif But untill I'll buy the sleve from GMC I'm going to get rid of this damn Cat cause it sound like dozen of pots under my car, during every gear change smileys/happy.gif So if the ECU light turns on I can easly drive a car wright? And than after puting this sleve ECU should go out?

[sevenfourate]

Some people drive with the EML light on for ages or even permanently,and their cars seems fine.

Although your ECU compares readings between the 1st and 2nd Lambda sensors to set fuelling,ignition etc etc SO,if the light is on for this reason,its telling you it CANNOT compare the readings - so what its basing its settings on god knows !

The sleeve from GMC encases the 2nd lambda and fools the car into reading "dirty clean air" !!! ie : The car normally needs to be reading that the gases from the 2nd lambda are cleaner than those from the 1st (showing the cat is working).Because we dont have a cat we have to "con" the ECU and this is what the sleeve does - it effectively traps some fresh air in the sleeve which will ALWAYS read cleaner compared the gases passing over the first Lambda and so your little ECU/EML light on dash goes out smileys/happy.gif

[saxorulez]

Good, I've emailed GMC about the prices and postage today. But I'm wondering about one thing if my cat is broken inside so it should not work propertly and ECU should goes on, am I wright? So maybe if the ECU light is not shining at the moment, it will not shine after de cat. Just like Trickyd and Kotl_VTS16 said...

[sevenfourate]

Only one way.Try the de-cat and if the EML (engine management light) comes on then you'll have to get a sleeve from GMC.


I wouldnt worry about driving for a few days with the light on to be honest....if you want to try it before you order the sleeve that is.

[saxorulez]

And that is the answer I was hoping for smileys/smiley2.gif Thx a lot

[sevenfourate]

Glad to help smileys/happy.gif


Had my car rolling roaded once when i had Lamda problems.
Not really sure of the implications but i seem to remember something about "open loop" and "closed loop" ?

The guy who rolling roaded my car said "get it fixed" and made me aware of the problem but wasnt unduly concerned about it.

Personally my car ran fine and the rolling road result that day showed no undue problems caused by the Lamda/s playing up and hence EML light being on.

I also know of others the same and a few guys who have run for years ? like it as the GMC sleeves can apparently be a little bit "hit and miss" (tempremental).

GOOD LUCK !!!! smileys/happy.gif

[saxorulez]

I have a good news!! It wasnt a oat that was banging all the time, it was manifold, hiting in some nut. After a visit in a good garage everything is fine smileys/happy.gif Now I'm going to collect some money and do the head work cause my headgasket is leaking... smileys/smiley11.gif