wiltshire_boy

As above. I have a UK MY94 with standard exhaust system bar a Prodrive back box.

The failed tests were:

Fast idle test Limits Actual Value

Lambda: 0.97 - 1.03 99.99

Second fast idle test

CO: < 0.30 % 0.73 %

Natural idle test

CO: < 0.50 % 0.62 %

Does this make sense to anybody and wtf is that first Lambda reading all about?

The guy who tested was a bit non-comittal and suggested either a cat had gone or the Lambda sensor. Can you tell from these results?

The car must have been cold as it was only a two minute drive from home to drop the car at 10 ish and this test seems to have been done at 12.30. Shall i just take it for a retest after a bloody good warm-up drive or is that a waste of time?

Cheers,

Roy.



[Edited by wiltshire_boy - 10/28/2003 10:55:16 PM]

scoobytypeR

I had a similar problem that lasted for weeks.

no bugger on here bothered to even attempt to help me, so I had to fork out £138.00 for 2 hours labour in interpro, for them to tell me my Lamda sensor was knackered.

Emmisions were still crap and no where near passing even after i forked out a bomb for a standard exhaust with cats, but they suggested getting a standard Bosch or Lucas, 3 wire sensor and fitting that to the downpipe (only 50 quid new) and it worked a treat ;0)

Now SVA passed and MOT...expecting my UK registration through tommorow ;0)

hope this helps.
Matt

wiltshire_boy

Cheers Matt. Sorry to hear about your woes, glad you got it sorted. Now i'm gonna pester you some more

Do you know if the Lucas and Bosch Lambdas are a straight swap please? I'm still wading through a load of "search" results and am getting v. confused!

Anyone know exactly where the lambda sensor on a UK MY94 is please?

I was going to try cleaning the lambda, resetting the ECU then going for a long thrash to get the cats nice and warm.

Roy.

greasemonkey

Lol. This is a public forum, not Matt's private support network. If a question you posted didn't get answered, the likeliest reason is simply that nobody who saw it knew the answer. However, it could also be that your attitude sucks, as your last comment ably illustrates.

In any case, far from people not being bothered to help you, a number of us have attempted to do so at various stages during the process of obtaining your car, either under your current guise or your previous username.

After a number of instances where you were obviously ignoring answers to your posts (you kept starting thread after thread to ask the same question, despite previously getting an answer), and changing your story regarding the modifications fitted to the car, I decided I'd had enough of repeating myself. Maybe others did likewise?

And exactly how do you think we'd have magically been able to diagnose a failed sensor over the internet? Ultimately the only answer you'd have got here would have been to get it checked professionally.

Funny, I seem to recall you telling us that the importer of your car was going to do whatever was necessary to get it through the SVA - including lending you an exhaust?

MrDBM

similar situation only my dealer had previously said my lambda was completley trashed.

Took it for the MOT anyway, but had it VERY warm (oil temp over 100 degrees) and the guy tested it within 20 minutes of my stopping - passed with flying colours..!

wiltshire_boy

After more reading:

Can you clean a lambda sensor or shall i just go and get a new one from the motor factors?

Ta,

Roy.

bits'n'pieces

You can heat them up with a blow torch until red hot, sometimes this burns out any crap in it, failing that the sam centre for a standard three wire one works a treat, doesnt matter which of the two grey wires goes where, just make sure the black goes to black !

wiltshire_boy

Cheers

RayC

mine was almost identical - dead lambda sensor

Greeno

Wiltshire_boy...

Get your self signed up on scoobyzone

And post the same post on here, someone might help you out...hint hint...plus your local...

G.



[Edited by Greeno - 10/29/2003 11:47:49 AM]

Jolly Green Monster

iTrader: (4)

Halfords do a sensor L300 I believe it is for £25 which goes straight in.. you just need to change the wiring over..

worth a try for £25..

JGM

mart360

Re lambda bits..


a generic part from Halfords is approx £30

fitting 10 mins...

my my96 has just sailed through its mot,,, the comment from the tester was that the cat cooled down very quickly,

but once warm the values hit the floor .... if it only failed on emmisions,

a new lambda sensor and a retest should get you through..

the one to look for and please correct me if im wrong,,,

the lambda sensor only returns a value of what its status is ie high or low... its sole purpose it to tell the ecu to richen or lean the mixture... if this fails ie locks high or low you get a correponding result...either rich or lean mixture...

given the amount of posts on this subject, i along with the others

fail to see how you can state you got no help,, i have posted regarding this type of issue several times over the last few months


Mart

wiltshire_boy

LOL Greeno.

I get the hint! I can never remember which sites i have signed up with though so usually end up on here most of the time.

Looks good and i am off to sign up now

Roy.

wiltshire_boy

.

[Edited by wiltshire_boy - 10/29/2003 4:38:12 PM]

wiltshire_boy

Really confused now. Bought an L300 universal lambda from Halfords and it has a black and two white wires. My existing lambda has a black, a red and a white.

Which wouldn't be so bad if it wasn't for the fact that i had forgotten my wallet so have made two trips already. [img]images/smilies/mad.gif[/img] [img]images/smilies/mad.gif[/img]

And will have to go back again for a refund as the guy had said that this was the only lambda sensor they had in stock. [img]images/smilies/mad.gif[/img] [img]images/smilies/mad.gif[/img] [img]images/smilies/mad.gif[/img]

Might well have a drink or two tonigh as this is the continuation of three days of the worse luck i've ever experienced.

Thanks for the help though, and for the record:

A UK MY94 has its lambda (or O2 if you prefer) sensor in the downpipe and it has three wires; red, black and white.

ZippyEFC

Do what bits n pieces said and just make sure black goes to black.

AudiMan

Wiltshire Boy,
Had exactly the same problem with my MY00 (std other than prodrive backbox), car failed emmisions, but as it was in for a service at the time they took it for a good run and retested and it passed fine, might be worth a try,

Ian..

Aztec Performance Ltd

iTrader: (234)

I disagree with you ScoobyTypeR...I have had an excellent response on all posts...
Scoobynet has been v v helpful.

Greasemonkey: Am changing the turbo this weekend (weather permitting) using your instructions which seem v straight forward to follow...will let you know how I get on

Bob

(edited to correct the name from Wiltshire to ScoobyTypeR)

[Edited by BOB'5 - 10/30/2003 1:27:26 PM]

TON3

Wow i'll remember not 2 upset u grease monkey!

Jolly Green Monster

iTrader: (4)

If you have the lambda in the downpipe the only difference is the wire colour..

As said I believe it is black to black, white to white and red to white..

JGM

wiltshire_boy

Thanks guys

BOB'5. Look again, it's not me who's moaning is it? I always get loads of good advice from this site.

wiltshire_boy

Any tips on how to get the bugger off? Is it worth buying one of those special lambda sockets as i don't have a big enoug ring spanner and it all looks a bit tight down there anyway?

Is it easier to come at her from below?

NotoriousREV

Wait a minute, I think there's confusion on the wiring here.

On the car loom, the red and black wires are +ve and -ve for the Lambda heater and the white is the signal wire.

On the universal sensor, the black wire is the signal wire and the 2 white wires are +ve and -ve.

At least thats how mine is wired and my AFR guage reads correctly and the car runs great.

Anyone care to comment?

wiltshire_boy

This is what confused me and is why i have decided to get a red, black and white wired one. Anyone want an L300?

wiltshire_boy

Ah, changed my mind when they tried to charge me £95 for a non-genuine sensor at the motor factors. But they did have 22mm ring spanners. I'm going to take the good advice i've already been given and use the L300 from Halfords.

Aztec Performance Ltd

iTrader: (234)

Wiltshire: Sorry mate, was confusing you for ScoobyTypeR.

Have ammended the previous post,

Regards,

Bob

Nowucme

OK, same topic, but for a MY00. Just got back from MOT and its failed on emissions - results were:

CO 5% - should be less than 0.3%. It also has the Lambda as a fail.

Now the mechanic said its nothing to do with CAT's as if the engine is working correctly then the exhaust fumes wouldn't even reach a CAT with CO levels this high.

Is this correct?

Could the Lambda sensor be faulty and if so would that cause CO levels to be this high?

What else could it be? Mis-fire??

Edited to say - could the ECU error log identify the fault?

Thanks for any speedy responses

[Edited by Nowucme - 10/30/2003 1:58:49 PM]

Adam555

Its the lambda alright

I had the same problem with my Sti2 - failed the MOT on emissions - lucky enough I had taken my car to Power Engeering a few weeks before for a Rolling Road Diag Test and they had identifed that the lambda was dead then

The guys at the MOT place were saying it was the Cats but I stuck to my guns and popped back to PE and picked a new lambda for £280!!

Took it back to MOT place and got them to fit and re-test - and hey presto it passed

I did notice that once the lambda was fitted again - performance was much better and so was the fuel ecom

Mark A

iTrader: (1)

Try this site http://www.cats-direct.com
Most helpful and a quick service.

I refuse to pay £280 for Bosch sensor that retails at £50 most likely.

Scoobytype r try using the search facilty next time, works well as this type of topic is covered all the time.

Mark A

wiltshire_boy

Came out and went in quite well in the end (bloody warm down there). I'll know tomorrow whether this has fixed the O2 readings. Thanks again everyone, i should just learn to stop and read properly sometimes.

np BOB'5