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View Poll Results: Eco Switch On or Off?
On 34 85.00%
Off 6 15.00%
Voters: 40. You may not vote on this poll

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  #1  
Old 08-13-2014, 10:05 AM
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ECO On/Off

As I posted yesterday, I have a 2014 JGC 3.6 Altitude with 1,500 miles on the odometer and been having some annoying (and downright concerning) noises coming from the engine bay. The sounds appear to coincide with the cycling of the A/C.

Anyway, long story short, I've been driving since yesterday with the ECO switch off as soon as I start the engine. So far, no annoying sounds. It could be coincidental or it could be a direct correlation.

Just wanted to see who else drives with the ECO on/off and have they experienced similar or different experiences.

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Old 08-13-2014, 10:44 AM
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Re: ECO On/Off

I rarely push that button. Eco mode is just fine with me. If I need a little boost I drop the shifter into sport, and I don't do that often. Even merging onto interstates, I get plenty of power. As far as the sounds you're hearing from the engine bay, I'm not noticing any myself, but since shifts hold off a little longer in Eco mode, maybe you're hearing the engine lug a little. I've read on other threads that it can take several thousand miles for the tranny adaptive learning curve to get used to your driving style.
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Old 08-13-2014, 11:07 AM
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Re: ECO On/Off

My engine grumbles if I have to keep it at a low speed. Because we have so many 25mph zones around here, I always turn eco off. If I forget, I am reminded as soon as I hit a long 25 mph area. It seems my Hemi doesn't like 5th gear at that speed.


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Old 08-13-2014, 05:17 PM
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Re: ECO On/Off

Quote:
Originally Posted by bill_de View Post
My engine grumbles if I have to keep it at a low speed. Because we have so many 25mph zones around here, I always turn eco off. If I forget, I am reminded as soon as I hit a long 25 mph area. It seems my Hemi doesn't like 5th gear at that speed.


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Hmm, mine gets the "ECO grumbles" around 40 mph, most noticeable when applying very light gas pedal to speed up a mile or two.

Still, I leave ECO on except for a few passing/merging situations... or occasionally when feeling my Cheerios.
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Old 08-14-2014, 06:07 PM
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Re: ECO On/Off

I usually leave mine in Eco mode regardless of city or highway driving. I don't notice any lugging and hear no unusual sounds. It's just a little slower to respond when you apply the gas... and that will usually cause it to downshift. I'm used to it so it doesn't bother me one way or the other. I do see a noticeable increase in my mpg reading while in Eco.
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Old 08-26-2014, 08:02 PM
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Re: ECO On/Off

The Hemi will "grumble" in ECO mode at lower speeds because of cylinder deactivation (MDS). It's more noticeable at lower speeds because of the lower base RPM. The only reason a 3.6 might grumble (without a problem) might be because of a bit of engine lugging with ECO mode causing the transmission to hold a higher gear longer.
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