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Author Subject: Lambda Sensor.
pebbles167

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Location: Melksham. Wiltshire.

Registered: 08 Dec 2009

Posts: 2,516

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Post #1
I have a devil decat for use on track, however it does not have a lambda sensor fitted. Just a hole.

I know what a pain these can be to get off of an exhaust, and wondering weather I actually need one. I'm vaguely aware of what purpose they serve but dont ever have to deal with them much. And after all it will only be for a few track sessions. MPG isn't important, and If its not going to make a massive difference I wont bother to go buy one.

I assume by not using one my car would just run lean? No real problems? (providing I plugged the hole)

Cheers,

Pebbles. Thumbs up

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2005 Peugeot 206 GTI 180

2008 BMW K1200R
Posted 17th May 2014 at 00:04
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

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Post #2
Is this on your Rallye?

If so, what happened to the original lambda sensor? Without one fitted, the ECU will run in factory mode and will run richer than desired, thus fuelling too much and causing bore wash in some circumstances.

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"Supercharged - 454.1bhp/317.5lb/ft"
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Posted 17th May 2014 at 00:09
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pebbles167

Seasoned Pro

Location: Melksham. Wiltshire.

Registered: 08 Dec 2009

Posts: 2,516

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Post #3
Its on jimmy's old Rallye. The original lambda is still currently fitted to the cat, and in fine working order. The decat supplied came without a sensor. I have removed (or tried to remove) lambda's before and they dont always play ball and end up damaged.

If the over fuelling could potentially cause issues then I'll get one sorted.

Cheers Stan the man Smile

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2005 Peugeot 206 GTI 180

2008 BMW K1200R
Posted 17th May 2014 at 00:17
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

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Post #4
If this is Jim n Dave's Rallye it will of been swapped from cat to decat for mot time so I reckon you'll have no problem swapping it over, mine has been swapped several times over the years and has been ok to get off each time.....

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Posted 17th May 2014 at 02:24
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

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Post #5
Just man up and change it over.

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need a part number? get on here - http://public.servicebox.peugeot.com

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Posted 17th May 2014 at 06:08
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pebbles167

Seasoned Pro

Location: Melksham. Wiltshire.

Registered: 08 Dec 2009

Posts: 2,516

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Post #6
Cheers jeffers Thumbs up

And mei, are you sure my wee little arms are up to the challenge. They look like noodles. LOL

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2005 Peugeot 206 GTI 180

2008 BMW K1200R
Posted 17th May 2014 at 10:14
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

Status: Offline
Post #7
Leverage lad, leverage!

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 17th May 2014 at 10:28
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jimmy_boy

Senior User

Location: Christchurch

Registered: 09 Jun 2003

Posts: 14,752

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Post #8
jeffers wrote:
If this is Jim n Dave's Rallye it will of been swapped from cat to decat for mot time so I reckon you'll have no problem swapping it over, mine has been swapped several times over the years and has been ok to get off each time.....


Correct. I believe we used to put a bit of copper slip on with the thought it might help corrosion resistance but it may not have helped at all LOL

The decat hadn't been on there for at least 2 years though so maybe heating up the cat first and using a big pair of grips.

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GTI-6 & Rallye

Rallye gets sideways in the wet at Snetterton Ninja
Posted 21st Jun 2014 at 16:52
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