O2 sensor

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GatisGirdenis

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	O2 sensor « on: October 09, 2017, 02:57:10 PM »

Hello,
I've got a fairly quick question.
As far as I've read on the forums and seen it mentioned, like, everywhere, the ME7.1 is a narrowband ecu, on 1.8t that is.
I swapped my car to a 24V VR6 and it has a ME7.1G ECM, which is paired with a single 6 wire O2 sensor and the post cat one, which would make me think it's a wideband?
I might want to go MAFless some day, so I was thinking if I'll need to swap the ecu to ME7.5?


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nyet

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	Re: O2 sensor « Reply #1 on: October 09, 2017, 03:34:54 PM »

Quote from: GatisGirdenis on October 09, 2017, 02:57:10 PM

I might want to go MAFless some day

why?


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GatisGirdenis

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	Re: O2 sensor « Reply #2 on: October 09, 2017, 03:51:18 PM »

Quote from: nyet on October 09, 2017, 03:34:54 PM

why?

Might want to try and figure out how to do an ITB setup on a stock ECU. It would make more sense going with a standalone, I know, I know, but living in a not so wealthy country is the reason I might not want to shed a grand on an ECU, if it's avoidable somehow


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KasperH

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	Re: O2 sensor « Reply #3 on: October 10, 2017, 12:30:57 AM »

You could do ITB and still have MAF, just put a airbox on it


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GatisGirdenis

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	Re: O2 sensor « Reply #4 on: October 10, 2017, 05:18:18 AM »

Quote from: KasperH on October 10, 2017, 12:30:57 AM

You could do ITB and still have MAF, just put a airbox on it

I guess, but the clearance on a MK4 24v already is tight, so building an efficient airbox could be quite a struggle.
I'm also one of the guys who 'doesnt like the look of a MAF', so if it is indeed a wideband, which I think it is, just need a confirmation, I dont see a problem going MAFless.


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KasperH

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	Re: O2 sensor « Reply #5 on: October 10, 2017, 12:27:19 PM »

By your description, yes I believe it is a wideband. (6 wire pre cat probe and a post cat probe)
But not 100% sure since its a VR6


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GatisGirdenis

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	Re: O2 sensor « Reply #6 on: October 10, 2017, 09:28:44 PM »

Quote from: KasperH on October 10, 2017, 12:27:19 PM

By your description, yes I believe it is a wideband. (6 wire pre cat probe and a post cat probe)
But not 100% sure since its a VR6

Is there any way I can check? Like, measure some blocks in vagcom or something similar?


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KasperH

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	Re: O2 sensor « Reply #7 on: October 10, 2017, 11:02:54 PM »

What is the software number of the ECU?


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Carsinc

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	Re: O2 sensor « Reply #8 on: October 12, 2017, 08:05:53 AM »

Yes its probably wideband, but thats not the point, its also DBW...


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GatisGirdenis

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	Re: O2 sensor « Reply #9 on: October 13, 2017, 06:04:40 AM »

Quote from: KasperH on October 10, 2017, 11:02:54 PM

What is the software number of the ECU?

I guess this is the software number? 362915? It's a version 0005.

Quote from: Carsinc on October 12, 2017, 08:05:53 AM

Yes its probably wideband, but thats not the point, its also DBW...

I'm almost certain that I could sacrifice a throttle body and make a DBW ITB setup. It would slightly reduce the throttle response, but I'm after the volumetric efficiency of the ITBs which can go even above 100% at a set range. Also, as far as I know, the idle control is done by the ECM with the throttle plate, so that would make it slightly easier to set up the ITBs, if I COULD get it to work.
Looked up DBW ITBs and looks like Honda people have done it quite a bit


« Last Edit: October 13, 2017, 06:15:17 AM by GatisGirdenis »	Logged

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