4396 replies to this topic

[oakmere]

Good you found the issue but a shame it is a more expensive fix. I have been very happy with my Magnaflow cat. £100 on eBay. Though not sure how long it would last SC but it can't be worse than the Tullet.

[CHILL Gone DUTCH]

I'm slowly picking at the lose CAT I'm going to take it out and run the car without a CAT for a while

[CHILL Gone DUTCH]

The pipe is clear of all the CAT, Is this officially decated now??

[techieboy]

Yup. And better yet, at a casual glance, it'll still look like you're running one. It'll be interesting to see if you can eek out any power gains from it with some more learning. De-cat'ing mine did absolutely nothing for the power and may even have lost a little.

[CHILL Gone DUTCH]

Yup. And better yet, at a casual glance, it'll still look like you're running one. It'll be interesting to see if you can eek out any power gains from it with some more learning. De-cat'ing mine did absolutely nothing for the power and may even have lost a little.

It's running shite now it will need mapping and ignition playing with again will post results in a bit

Edited by CHILL Gone DUTCH, 10 July 2013 - 04:32 PM.

[CHILL Gone DUTCH]

the red line is with the cat removed

 

 

 

black line is map before removing cat when i  it was running ok

[CHILL Gone DUTCH]

torque seems better,

but it didnt feel great 

[CHILL Gone DUTCH]

i have got a error code P0141

second lamda i think, is this because there is no CAT

[ArticMonkey]

You will want an O2 sensor spacer to take it out the flow of the exhaust. Readings will be off now there's no cat doing its job. Or get the O2 cheater from slindborg which will take some work but makes the ecu think there's a cat in place.

[NickB787]

why not disable it?

[CHILL Gone DUTCH]

You will want an O2 sensor spacer to take it out the flow of the exhaust. Readings will be off now there's no cat doing its job. Or get the O2 cheater from slindborg which will take some work but makes the ecu think there's a cat in place.

 

 

is that like a nut on the end of the lambda

[CHILL Gone DUTCH]

why not disable it?

 

the cat test is disabled but the code still there.

[CHILL Gone DUTCH]

But no EML

[ArticMonkey]

A long one yes. I've had it on several decat'd cars. They're normally around 2" long and the lambda simply bolts into it.

[Nev]

The bigger HJS cats are good quality BTW, I had a 100 cell one that survived in Nipper fine.

[NickB787]

The bigger HJS cats are good quality BTW, I had a 100 cell one that survived in Nipper fine.

 

Not certain what one Jim used it's BIG though

[CHILL Gone DUTCH]

The bigger HJS cats are good quality BTW, I had a 100 cell one that survived in Nipper fine.

 

cheers NEV not putting a cat in at the moment, 

but will be looking to replace it soon so will keep that in mind

[techieboy]

i have got a error code P0141 second lamda i think, is this because there is no CAT

But no EML

You have still got your post cat sensor installed and connected up, haven't you? That's a fault code related to the heater circuit in the lambda which would point to the lambda not being powered up. Good that it's not pinging up an EML though.  

You will want an O2 sensor spacer to take it out the flow of the exhaust.

Didn't work on the VX or a different one on a previous Audi. 

[CHILL Gone DUTCH]

 

i have got a error code P0141 second lamda i think, is this because there is no CAT

But no EML

You have still got your post cat sensor installed and connected up, haven't you? That's a fault code related to the heater circuit in the lambda which would point to the lambda not being powered up. Good that it's not pinging up an EML though.  

You will want an O2 sensor spacer to take it out the flow of the exhaust.

Didn't work on the VX or a different one on a previous Audi. 

 

 

Yes is still connected up, 

 

theres two options i think

 

1. Lambda got broke by cat breakage, 

2. i broke it when i took it out to get the CAT out.

 

can i just leave this diconnected, as i have the catalyst check disabled

[davemate]

 

 

i have got a error code P0141 second lamda i think, is this because there is no CAT

But no EML

You have still got your post cat sensor installed and connected up, haven't you? That's a fault code related to the heater circuit in the lambda which would point to the lambda not being powered up. Good that it's not pinging up an EML though.  

You will want an O2 sensor spacer to take it out the flow of the exhaust.

Didn't work on the VX or a different one on a previous Audi. 

 

 

Yes is still connected up, 

 

theres two options i think

 

1. Lambda got broke by cat breakage, 

2. i broke it when i took it out to get the CAT out.

 

can i just leave this diconnected, as i have the catalyst check disabled

 

 

No, you need the second sensor.

 

I have faced this. I didnt have the second one on the previous CMS map as it is disabled but witht he obdtuner software it needs the second one. So I am off to get a bung fitted into my car soon. You couldput a cheater in, but you would be better off with an actual sensor and letting the software do its job.

 

If your map expects a CAT and now you dont, it will bring up an error code to you.