Pre Cat Manifold delete?

[AdamLalana]

I have bashed/ drilled and sweated to get the center out of the Pre Cat on the Manifold. The car runs fine. But bogs down in first, at low revs.
Will resetting the throttle body sort this out, or would it need a remap?
this is on a 1.4 petrol BBY

 

[birtyA2]

Hi

Never heard of that being done! What was the reason out of interest. I assume that as it’s supposed to be present it may cause problems with emissions, the pre cat lambda will be fine (does most of the heavy lifting as far as fuel mix is concerned) but the post cat lambda may be sending an altered range of signals to the ECU which may cause problems

best wishes

J

 

[AdamLalana]

Hi

Never heard of that being done! What was the reason out of interest. I assume that as it’s supposed to be present it may cause problems with emissions, the pre cat lambda will be fine (does most of the heavy lifting as far as fuel mix is concerned) but the post cat lambda may be sending an altered range of signals to the ECU which may cause problems

best wishes

J

Because every car is the same that have a pre cat.It is only there for emissions regd, and usually not the UK market. They sell after market ones so the idea obviously is not that wild as there is a market for the sales : https://www.ebay.co.uk/p/5037230603
How ever as I swapped a engine I thought why not as the manifold was off.
It doesn't cause any issues with any 02 or lambda sensors
It doesn't cause issues with MOT emissions testing.

 

[birtyA2]

Because every car is the same that have a pre cat.It is only there for emissions regd, and usually not the UK market. They sell after market ones so the idea obviously is not that wild as there is a market for the sales : https://www.ebay.co.uk/p/5037230603
How ever as I swapped a engine I thought why not as the manifold was off.
It doesn't cause any issues with any 02 or lambda sensors
It doesn't cause issues with MOT emissions testing.

Ok, interesting. I would try adapting the throttle body as a starter for 10, doesn’t cost anything

j

 

[AdamLalana]

Ok, interesting. I would try adapting the throttle body as a starter for 10, doesn’t cost anything

j

I would need the full version of VCDS I think? unless there is another way pm me

 

[Robin_Cox]

I would need the full version of VCDS I think? unless there is another way pm me

Or an Xtools VAG401. That adapts the AUA throttle body.