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Omega Help Area => Omega General Help => Topic started by: tgm147 on 31 January 2012, 13:12:36

Title: Bashing out the pre-cat on a 2.2
Post by: tgm147 on 31 January 2012, 13:12:36

Hi guys.

If I'm right, the 2.2 petrol has a pre-cat and a main cat. If I were to knock the insides out of the pre-cat, would this bring up the EML? From what I can remember the lambdas will ignore it and focus only on the main cat but I can't remember.

Cheers.

Title: Re: Bashing out the pre-cat on a 2.2
Post by: henryd on 31 January 2012, 20:57:23

That will depend on whether the post cat sensor is before or after the second/main cat

Title: Re: Bashing out the pre-cat on a 2.2
Post by: tgm147 on 31 January 2012, 21:43:11

If memory serves it's AFTER the main cat and the first one is before the pre-cat but I'll double check that tomorrow.

Title: Re: Bashing out the pre-cat on a 2.2
Post by: henryd on 31 January 2012, 22:18:24

Quote from: tgm147 on 31 January 2012, 21:43:11

If memory serves it's AFTER the main cat and the first one is before the pre-cat but I'll double check that tomorrow.

If its after the main cat you should be ok as long as the main cat is working as it should be :y

Title: Re: Bashing out the pre-cat on a 2.2
Post by: twiglet on 31 January 2012, 22:23:27

Quote from: henryd on 31 January 2012, 22:18:24

Quote from: tgm147 on 31 January 2012, 21:43:11

If memory serves it's AFTER the main cat and the first one is before the pre-cat but I'll double check that tomorrow.

If its after the main cat you should be ok as long as the main cat is working as it should be :y

It is  :y

Title: Re: Bashing out the pre-cat on a 2.2
Post by: SIR Philbutt on 01 February 2012, 00:11:21

Quote from: tgm147 on 31 January 2012, 13:12:36

Hi guys.

If I'm right, the 2.2 petrol has a pre-cat and a main cat. If I were to knock the insides out of the pre-cat, would this bring up the EML? From what I can remember the lambdas will ignore it and focus only on the main cat but I can't remember.

Cheers.

Why ?

Title: Re: Bashing out the pre-cat on a 2.2
Post by: tgm147 on 01 February 2012, 08:45:02

Quote from: Philbutt on 01 February 2012, 00:11:21

Quote from: tgm147 on 31 January 2012, 13:12:36

Hi guys.

If I'm right, the 2.2 petrol has a pre-cat and a main cat. If I were to knock the insides out of the pre-cat, would this bring up the EML? From what I can remember the lambdas will ignore it and focus only on the main cat but I can't remember.

Cheers.

Why ?

I've narrowed it down to being one of the rattles the car has. If I tap it with a hammer I can hear things moving around inside. I'd rather take it out and smash the guts out of it before it blocks the rest of the system. Also hoping to maybe squeeze another couple of BHP from it!

Title: Re: Bashing out the pre-cat on a 2.2
Post by: Marks DTM Calib on 01 February 2012, 09:10:50

Main sensor should be before the pre-cat......or it wont be able to monitor mixture.  :y

Title: Re: Bashing out the pre-cat on a 2.2
Post by: tgm147 on 01 February 2012, 09:41:18

Quote from: Marks DTM Calib on 01 February 2012, 09:10:50

Main sensor should be before the pre-cat......or it wont be able to monitor mixture.  :y

Right so the first sensor is before the pre-cat, and the second is after the main one. The main cat was replaced with a Vauxhall one a couple of years ago so that's in good condition. In that case out comes the pre-cat then. This sound ok to you more experienced people? Heard of people doing it on the V6 engines but that's it.

Title: Re: Bashing out the pre-cat on a 2.2
Post by: SIR Philbutt on 01 February 2012, 19:33:36

Quote from: tgm147 on 01 February 2012, 08:45:02

Quote from: Philbutt on 01 February 2012, 00:11:21

Quote from: tgm147 on 31 January 2012, 13:12:36

Hi guys.

If I'm right, the 2.2 petrol has a pre-cat and a main cat. If I were to knock the insides out of the pre-cat, would this bring up the EML? From what I can remember the lambdas will ignore it and focus only on the main cat but I can't remember.

Cheers.

Oh I see - Thanks

Why ?

I've narrowed it down to being one of the rattles the car has. If I tap it with a hammer I can hear things moving around inside. I'd rather take it out and smash the guts out of it before it blocks the rest of the system. Also hoping to maybe squeeze another couple of BHP from it!