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        General >> OBD Advice >> HO2S12 without cat!!!
        
(Message started by: OHC on Dec 7^th, 2005, 6:15am)

Title: HO2S12 without cat!!!
Post by OHC on Dec 7^th, 2005, 6:15am

Hello!

I need a tech advise from site admins. Everybody’s opinion is also welcome. The cat on my 2.0 16V 1995 has died – it roars on 2000 rpm. The only option I have is to remove it. The prob is to cheat post-cat HO2S. Eric_R suggest supplying a small voltage to it, but it’s difficult for me. But I’ve read on the main site that catalyst monitor is performed only if EGR is complete. Since I have the EGR plugged due to the valve malfunction the monitor will not be complete and OBD won’t carry out catalyst monitor - and bingo! I can remove the cat without any problem.

Any opinion welcome

Best regards,
Serguey

Title: Re: HO2S12 without cat!!!
Post by scorpio_man on Dec 7^th, 2005, 9:20pm

hi there

you don't need to do anything to the lambda sensor(s)! :-/ you're only removing a bit between the sensors. in fact, if you did something to the sensors, the fueling would be all over the place!

i've been running without a cat for over a year now (lpg) without any problem. :)

Title: Re: HO2S12 without cat!!!
Post by OHC on Dec 8^th, 2005, 5:50am

Hello!

Thanks for reply. Have you performed an OBD scan without cat! Have you tried it on petrol? What about LTFT and DTC? It's really interesting!

Best regards,

OHC

Title: Re: HO2S12 without cat!!!
Post by scorpio_man on Dec 8^th, 2005, 7:05pm

hi there

if there is nothing wrong with the fuel system before removing the cat, then there won't be anything wrong afterwards.

as i said, the car doesn't mind if the cat is there or not as long as the lambda sensors are working.

Title: Re: HO2S12 without cat!!!
Post by Octavian_P on Jan 8^th, 2006, 7:45pm

From what i learned from this forum is that the front lambda (the one before the CAT) is the real importatn one, the rear one is less important. I also want to take the cat out but just for higher performance.

Title: Re: HO2S12 without cat!!!
Post by scorpio_man on Jan 8^th, 2006, 8:23pm

hi there

with an induction air filter kit and the cat removed, you'll get +20 bhp!!! ;D

Title: Re: HO2S12 without cat!!!
Post by Octavian_P on Jan 8^th, 2006, 8:53pm

Yes i know, that's i'm after, lots of happy horses for my humble 2.3 ;D

Title: Re: HO2S12 without cat!!!
Post by david_molloy on Jan 19^th, 2006, 8:16pm

What type of induction kit ??
K&N??
Thinking of K&N for 24V
david

Title: Re: HO2S12 without cat!!!
Post by scorpio_man on Jan 20^th, 2006, 8:06am

hi there

this is my air filter.... http://www.jetex.co.uk/website/images/conicalangledchromelarge.jpg

with a s/steel heat shield.... http://www.espdesign.co.uk/esp.storefront/EN/Product/4505

hth

btw, here one for the 24v, but it costs £250! :o
http://www.espdesign.co.uk/esp.storefront/EN/Product/4052

Title: Re: HO2S12 without cat!!!
Post by david_molloy on Jan 20^th, 2006, 3:10pm

Thanks for info.
Like you say latter one looks a nice piece of kit
Think I'll leave it for now until more knowledgable with standard Scorpio
david