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#3221704 - 12/19/13 01:58 PM Re: Eco - what does it really do? [Re: coopns]
R2d2 Offline


Registered: 12/08/08
Posts: 528
Loc: New York, L.I
Its the rear bank, when it does happen.
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#3221738 - 12/19/13 02:31 PM Re: Eco - what does it really do? [Re: SIXSPEED]
SIXSPEED Offline


Registered: 08/12/10
Posts: 468
Loc: Arizona
Originally Posted By: SIXSPEED

The following linked article from Motor Magazine describes their observations and analysis of VCM operation on a 2012 Pilot. On page 18 they state that the Eco light had no correlation to actual VCM operation and that the Eco light came on when acceleration was not heavy or under a steady load.

http://www.motor.com/article_pdf_download.asp?article_ID=2108


It's interesting that the author of the Motor Magazine article observed a 10% duty cycle on VCM (cylinder deactivation) operation where it was on for 10 seconds and off for 90 seconds. So it appears the cylinders are only deactivated for a small duration at least during their test scenario at a steady load, speed and RPM rather than continuously.


Edited by SIXSPEED (12/19/13 02:33 PM)

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#3221766 - 12/19/13 02:52 PM Re: Eco - what does it really do? [Re: willbur]
Hokiefyd Offline


Registered: 06/24/04
Posts: 11496
Loc: North Carolina
Originally Posted By: willbur
The front cylinders? Are you sure about that? Perhaps I'm wrong but my understanding is that the number three cylinder is the troublesome one and it's on the rear bank on the drivers side. This bank gets all the hot air.


You are probably more familiar with it than I. I had thought it was the front bank. My bad, and thanks for the correction.
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#3222358 - 12/20/13 07:27 AM Re: Eco - what does it really do? [Re: coopns]
supton Offline


Registered: 11/09/08
Posts: 4951
Loc: NH
I had a rental Rio--Accent?--small Kia of some sort, I4/4spd auto, with an Eco light. I think if I accelerated slow the light would come on; it would seem to upshift faster and was less sensitive to throttle.

Stupid light would go out the moment I hit 70.
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#3222389 - 12/20/13 07:55 AM Re: Eco - what does it really do? [Re: Hokiefyd]
Miller88 Offline


Registered: 04/09/08
Posts: 6860
Loc: Onondaga County
Originally Posted By: Hokiefyd
Originally Posted By: willbur
The front cylinders? Are you sure about that? Perhaps I'm wrong but my understanding is that the number three cylinder is the troublesome one and it's on the rear bank on the drivers side. This bank gets all the hot air.


You are probably more familiar with it than I. I had thought it was the front bank. My bad, and thanks for the correction.


The front bank is the one that sludges up and destroys the camshaft.
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#3223002 - 12/20/13 06:31 PM Re: Eco - what does it really do? [Re: coopns]
mclasser Offline


Registered: 04/13/13
Posts: 378
Loc: DC
Originally Posted By: coopns
Honda Ody 12. I don't drive it much (wife does) but when coasting...Eco light comes on. Wife mentions it seems to 'suspend' the engine, she doesn't like the feeling. I just noticed it a bit the other day, could gently feel it.

Does it do something or is it just simply informing us?

Thanks.


My Pilot has the same VCM engine as your car. Some people say the ECO light illuminating isn't always related to the VCM engaging but everytime the light comes on for me, I feel a slight vibration which to me means the VCM is activating.
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#3223100 - 12/20/13 08:00 PM Re: Eco - what does it really do? [Re: mclasser]
Trav Offline


Registered: 11/20/06
Posts: 10052
Loc: MA, Mittelfranken.de
I cant say about the 2012 but every Honda I have worked on with VCM the eco light is directly related to VCM operation, I don't think they changed.
Other makes that use similar eco lights may or may not have VCM it may be just a simple vacuum operated switch.
Higher vacuum turns the light on (eco), lower turns it off.
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#3223102 - 12/20/13 08:03 PM Re: Eco - what does it really do? [Re: Miller88]
willbur Offline


Registered: 06/06/13
Posts: 44
Loc: sw ohio
FRONT BANK AND CAMSHAFT? Please provide your source for this info, or is just your opinion/conjecture? Look up Honda TSB SB-13-078 which addresses the V6 VCM issue and the class action lawsuit and settlement. Honda extends the warranty from 5 to eight years. It's about piston rings and rear bank, not camshaft.

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#3228732 - 12/26/13 09:39 PM Re: Eco - what does it really do? [Re: coopns]
wtd Offline


Registered: 06/25/02
Posts: 1189
Loc: southwest Mo.
Back in August I test drove a 2013 Challenger R/T with the 5.7 Hemi that had the Eco display and I could always tell when it went from 8 cyl. mode to 4 cyl mode. I didn't like how it felt and is one of the reasons I didn't buy it. I also test drove a 2010 Camaro SS that had this system but I couldn't tell when it was operating. I ended up buying a Mustang GT without this system. I don't want a vehicle that has it.

Wayne
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