Lambda extraction ???

Lambda extraction ???

Author
Discussion

Mr Cerbera

Original Poster:

5,031 posts

230 months

Thursday 14th June 2012
quotequote all
Hi All,

Mr Numpty here again. This is the connector end of my Lamda....



... could some genius tell me how the bloody hell they dis- and re-connect ??

Ta !

banghead

ukkid35

6,175 posts

173 months

Thursday 14th June 2012
quotequote all
Typically the connectors are cable tied to the chassis directly above the gearbox, you may be able to see from above if you look through the engine V. You will be able to feel from below, you probably won't be able to do both at the same time.

pmessling

2,284 posts

203 months

Thursday 14th June 2012
quotequote all
I think you have to twist them from what i remember.

ukkid35

6,175 posts

173 months

Thursday 14th June 2012
quotequote all
I think they are a squeeze to release, push to fit.

scotty_d

6,795 posts

194 months

Thursday 14th June 2012
quotequote all
ukkid35 said:
I think they are a squeeze to release, push to fit.
Just this i took mine off the other day i managed to squeeze my arm down to disconnect them after i cut a few cable ties on the bulk head.

Mr Cerbera

Original Poster:

5,031 posts

230 months

Saturday 16th June 2012
quotequote all
Errrr, Scott, or anyone for that matter, how did you unscrew the Lambda's from the Exhaust manifold ?

Please don't say that I've got to drop the gearbox again ???
banghead

Tanguero

4,535 posts

201 months

Saturday 16th June 2012
quotequote all
Crows foot on an extension bar on a ratchet.

Mr Cerbera

Original Poster:

5,031 posts

230 months

Saturday 16th June 2012
quotequote all
Blummin 'eck. Never seen a Crow's foot before so am just about to order off Amazon.

Ta Pete thumbup

ukkid35

6,175 posts

173 months

Saturday 16th June 2012
quotequote all
I'm sure I used a ring spanner without any problems at all.

Edit: I was thinking of a different car, ring spanner doesn't fit

Edited by ukkid35 on Monday 18th June 07:35

Mr Cerbera

Original Poster:

5,031 posts

230 months

Sunday 17th June 2012
quotequote all
Aha ! It turned out that all I had to do was remove the Chassis Brace and the Cats. Open-ended could then get in.

Of course, as usual, that raises another question.
In madmark's guide to Clutch replacement he mentions replacing the Lambdas into their respective manifolds.

Now why would you have to do this ?
Lambdas aren't adjustable are they ?
They just read and send values don't they ?
If this is so, is there anything that has to be reset when you install new ons ?

Thanks for any opininons and advice that you can profer.

thumbup

FarmyardPants

4,108 posts

218 months

Sunday 17th June 2012
quotequote all
The ecu will automatically adapt to the new lambdas. The only thing to be wary of is to plug each lambda into the correct harness plug, otherwise your adaptives will get screwed up and the car will run like a dog.

Mr Cerbera

Original Poster:

5,031 posts

230 months

Sunday 17th June 2012
quotequote all
Oh good grief rog, now you're starting to panic me yikes

When you say "harness plug" I'm not sure what you mean.

I have two cables for the Lmbdas emerging at the back of the engine block which have their respective sockets on them.

I've just pulled the plug out from the old lambda and stuck the new Lambda plug into the 'loom' socket a la ....



Have I cocked it up ?????
banghead

scotty_d

6,795 posts

194 months

Sunday 17th June 2012
quotequote all
That is correct, What he is saying make sure the right plug goes with the correct Bank for that lamda. Don't get them mixed up or it will confuse the ECU.

Mr Cerbera

Original Poster:

5,031 posts

230 months

Sunday 17th June 2012
quotequote all
Listen, I've admitted I'm dumb to everyone before so this will not surprise
anyone to hear that I don't understand what you're trying to get across to me.

BUT

Both the Lambdas are new.
There's no way trhat the ECU will know which feed is coming from which bank.

Will it ??

Surely it reads the lambda info and then adjusts the fuelling to each (set) of injectors.
It doesn't have a memory of what fuel settings it has provided does it ?
Each time you turn the engine on it starts from blank and then adjusts dynamically doesn't it ?

Please excuse the level of density getmecoat

and A BIG THANK YOU for trying. thumbup

scotty_d

6,795 posts

194 months

Sunday 17th June 2012
quotequote all
Mr Cerbera said:
Listen, I've admitted I'm dumb to everyone before so this will not surprise
anyone to hear that I don't understand what you're trying to get across to me.

BUT

Both the Lambdas are new.
There's no way trhat the ECU will know which feed is coming from which bank.

Will it ??

Surely it reads the lambda info and then adjusts the fuelling to each (set) of injectors.
It doesn't have a memory of what fuel settings it has provided does it ?
Each time you turn the engine on it starts from blank and then adjusts dynamically doesn't it ?
The ECU is wired to the cars main Loom so each bank of cylinders has one of those lamda plugs pre determined for each bank of cylinders a left bank and a right bank, so if you swap them round the ECU is looking for values for the correct O2 reading going back to it. So if the lamda is reading for the wrong bank it will try and adjust the fueling to correct it's self and in turn run like a bag of spanners. So the memory is in the ECU your Map it makes no odds if you fit new or old ones it will not know but cross the plugs over to the wrong bank it will run ruff.

Scotty

Mr Cerbera

Original Poster:

5,031 posts

230 months

Monday 18th June 2012
quotequote all
scotty_d said:
The ECU is wired to the cars main Loom so each bank of cylinders has one of those lamda plugs pre determined for each bank of cylinders a left bank and a right bank, so if you swap them round the ECU is looking for values for the correct O2 reading going back to it. So if the lamda is reading for the wrong bank it will try and adjust the fueling to correct it's self and in turn run like a bag of spanners. So the memory is in the ECU your Map it makes no odds if you fit new or old ones it will not know but cross the plugs over to the wrong bank it will run ruff.

Scotty
Scotty, if you are not a teacher then you are wasting your talents.

Thank you very much for your tenacity and a perfect explanation thumbup

Mr. Dullo !
wink

scotty_d

6,795 posts

194 months

Monday 18th June 2012
quotequote all
I am Glad it came across how it was in my mind, most people don't under stand my logic but it makes perfect sense to me lol.

Hope you get it all sorted in the end and that's what Piston heads is for i am always learning from this place it's great smile I hate Knowledge is power kind of people, Sharing is better for every one wink

Mr Cerbera

Original Poster:

5,031 posts

230 months

Friday 22nd June 2012
quotequote all
and whilst in the middle of my desparation of the crap engineering, I happened to find tha TVR did, in fact, label the Lambda cables so that such confusion couldn't occur...



DOH !

scotty_d

6,795 posts

194 months

Friday 22nd June 2012
quotequote all
In fact. every connection in the engine bay has a label on it from TVR smile if you can read them if they are clean even better. smile

paulh1975

5 posts

113 months

Thursday 20th November 2014
quotequote all
Mr Cerbera said:
Hi All,

Mr Numpty here again. This is the connector end of my Lamda....



... could some genius tell me how the bloody hell they dis- and re-connect ??

Ta !

banghead