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Author Topic: Need a Lambda sensor  (Read 10954 times)

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Jimbob

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Re: Need a Lambda sensor
« Reply #15 on: 01 August 2011, 14:27:26 »
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Ifg it helps, after a BLM reset, or a code clear (which resets BLMs on DBW)

does this apply when clearing with machines other than tech2, eg "My Naff Code Reader"?

seems to, yes  :y
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TheBoy

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Re: Need a Lambda sensor
« Reply #16 on: 01 August 2011, 14:48:08 »
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Ifg it helps, after a BLM reset, or a code clear (which resets BLMs on DBW)

does this apply when clearing with machines other than tech2, eg "My Naff Code Reader"?
How could I possibly know, seeing "My Naff Code Reader" is not available legally in the UK  :-X
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Kevin Wood

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Re: Need a Lambda sensor
« Reply #17 on: 01 August 2011, 15:03:17 »
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Ifg it helps, after a BLM reset, or a code clear (which resets BLMs on DBW)

does this apply when clearing with machines other than tech2, eg "My Naff Code Reader"?
How could I possibly know, seeing "My Naff Code Reader" is not available legally in the UK  :-X

Given that there's a simple OBDII command to clear the stored codes and that if I send it with my legal generic OBDII cable it also clears the fuel trims I would say that when the ECU interprets that command it also clears the fuel trims. ;)

We can therefore infer that, if the mythical legal tool known as "My Naff Code Reader" existed, it would have the same effect. :-X
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TheBoy

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Re: Need a Lambda sensor
« Reply #18 on: 01 August 2011, 15:12:45 »
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Ifg it helps, after a BLM reset, or a code clear (which resets BLMs on DBW)

does this apply when clearing with machines other than tech2, eg "My Naff Code Reader"?
How could I possibly know, seeing "My Naff Code Reader" is not available legally in the UK  :-X

Given that there's a simple OBDII command to clear the stored codes and that if I send it with my legal generic OBDII cable it also clears the fuel trims I would say that when the ECU interprets that command it also clears the fuel trims. ;)

We can therefore infer that, if the mythical legal tool known as "My Naff Code Reader" existed, it would have the same effect. :-X
My feelings exactly.  We all know a tool as dumb as "My Naff Code Reader" would no have the intelligence to go off and clear the BLMs (nor would you want it to, given the end results of many of its programming efforts), but I suspect its an ECU feature, not a Tech2 feature.
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feeutfo

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Re: Need a Lambda sensor
« Reply #19 on: 05 August 2011, 09:56:26 »
Well, it's done a tank of gas since last weekend and it's Friday. Light still off. Although there is probably a bank 2 fuel trim code, I'll check later.

But certainly seems as though changing the coil PAC has had a positive effect. Must admit I was surprised at the poor condition of the old one.  :-[
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feeutfo

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Re: Need a Lambda sensor
« Reply #20 on: 05 August 2011, 22:58:55 »
Yep. 0173 fuel trim malfunction bank 2.

Still no light though. But some slight hesitancy at top end wot.
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Lazydocker

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Re: Need a Lambda sensor
« Reply #21 on: 05 August 2011, 23:29:02 »
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Yep. 0173 fuel trim malfunction bank 2.

Still no light though. But some slight hesitancy at top end wot.

May be we need to do another calibration run in a couple of weeks... The map wasn't as good as I'd have liked but time was marching on ::)
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feeutfo

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Re: Need a Lambda sensor
« Reply #22 on: 06 August 2011, 10:15:54 »
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Yep. 0173 fuel trim malfunction bank 2.

Still no light though. But some slight hesitancy at top end wot.

May be we need to do another calibration run in a couple of weeks... The map wasn't as good as I'd have liked but time was marching on ::)
Could the hesitancy be to do with the lambda cycling, or not cycling as the case may be...?

Hoping to see Kev soon ish. Work is manic ATM.  >:(

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Kevin Wood

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Re: Need a Lambda sensor
« Reply #23 on: 06 August 2011, 11:43:13 »
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Could the hesitancy be to do with the lambda cycling, or not cycling as the case may be...?

Hoping to see Kev soon ish. Work is manic ATM.  >:(


Not at WOT. Lambda sensor should be out of the picture then. :-/
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Lazydocker

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Re: Need a Lambda sensor
« Reply #24 on: 06 August 2011, 18:55:48 »
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Could the hesitancy be to do with the lambda cycling, or not cycling as the case may be...?

Hoping to see Kev soon ish. Work is manic ATM.  >:(


Not at WOT. Lambda sensor should be out of the picture then. :-/
Which means it could be ::) bank 2 isn't going fully open loop and the lambda is doing an occasional half cycle  :-/
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Kevin Wood

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Re: Need a Lambda sensor
« Reply #25 on: 06 August 2011, 23:00:20 »
Open or closed loop is down to the ECU and it will go closed loop based on engine load at full throttle regardless of what the lambda sensor is doing.

Only question in my mind is whether the long term fuel trim is applied at full load. If it's built up a huge fuel trim that might explain it. :-/

Swapping the bank 1 and 2 lambda sensors would prove it one way or the other.


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feeutfo

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Re: Need a Lambda sensor
« Reply #26 on: 06 August 2011, 23:31:23 »
Really hoping it's something else. Certainly not looking forward to o2 sensors refusing to come out.  :(
« Last Edit: 06 August 2011, 23:32:17 by chrisgixer »
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Lazydocker

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Re: Need a Lambda sensor
« Reply #27 on: 07 August 2011, 11:17:28 »
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Open or closed loop is down to the ECU and it will go closed loop based on engine load at full throttle regardless of what the lambda sensor is doing.

Only question in my mind is whether the long term fuel trim is applied at full load. If it's built up a huge fuel trim that might explain it. :-/

Swapping the bank 1 and 2 lambda sensors would prove it one way or the other.



TBH, I wouldn't fancy the headache of getting both out ::) For the sake of £40 odd I think I'd just stick a new one in :-/

That sensor is definitely lazy as when left idling it stops switching. Mind you, my saloon had the same issue and seemed to be OK :-/
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feeutfo

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Re: Need a Lambda sensor
« Reply #28 on: 16 August 2011, 01:14:15 »
Misfire returned yesterday morning so new 246 Bosch coil PAC fitted today. £66

Got a genuine bosch lambda for £53 iirc while I was there. Will try and fit that tomorrow.... A bit previous without Kev checking over it but time is limited and 0173 is bothering me. It's dragging in too long.

All parts direct in Slough supplied.
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feeutfo

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Re: Need a Lambda sensor
« Reply #29 on: 16 August 2011, 01:16:52 »
Also noticed the loom plug to cp is broken. Split in the side.

It still clicks home fully and is solidly in place. Don't think it will affect it...?
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