Decat question

[bugracer]

Purchased my car a few months back.

Car has a Milltek system with decat.

Car went straight from the seller into the garage for a full service and MOT. And hence they had to put the cat back on.

I now have the decat back on the car, however here is a point i would appreciate any advice on.

The chap who sold me the car, when he had the decat on said he disconnected some wires under the car ( passenger side) and bagged the connectors (to keep clean)so as to ensure the serv light did not come on.

I have had a look to find the wires and do the same, but cannot find them.

Any one familiar with this ?

thanks

 

[minisuper666]

The chap who sold you the car disconnected the lamda (oxygen) sensor(s). Your cat should have a hole where the sensor screwed in. I'd start by that spot, and then work the way back towards the engine till you find the cables tucked away.

I removed the cat on my 172 but left the lamdas in place. It never turned the emission light on. I dont your decat pipe, but some have holes so you can plug the lamdas back in. Maybe they are plugged in and therefore you cant find the wires?

 

[st3ve]

If your lambda sensors aren't operating the engine won't be running right if at all surely?

 

[Jonny1*2]

sounds like the secondary lambda sensor. Not sure how bagging it has stopped the light though.

 

[Gray]

It will be the secondary lamba sensor, commonly disconnected to stop the warning light coming up on the dashboard..

Putting it in a bag will be simply "protecting" the probe from the elements, as it will normally be screwed into the de-cat

 

[Jonny1*2]

It will be the secondary lamba sensor, commonly disconnected to stop the warning light coming up on the dashboard..

Putting it in a bag will be simply "protecting" the probe from the elements, as it will normally be screwed into the de-cat

you would still be getting a warning on the dash though

 

[Gray]

TBH, there very hit and miss.. I know some people who have had them unplugged and tie wrapped out of the way for months and not had any warning lights come up.

But then, I have been running a de-cat for 2 years, with the lamba sensors in the de-cat and not a hint of a warning light

 

[st3ve]

Probably because it doesn't work. :rasp:

Mine came on after two weeks, not sure why it took that long but it's been on ever since. Suppose it can be hit and miss.

 

[Jonny1*2]

lol strange

 

[Gray]

I think the word your looking for is "French"

 

[Jonny1*2]

so true

 

[bugracer]

Thanks for your inputs, I will have a further dig around with the decat following your advice and see if I come up with the right combination.

Cheers