- First Name
- Andy
- Joined
- Nov 19, 2019
- Threads
- 59
- Messages
- 1,658
- Reaction score
- 1,266
- Location
- SanFrancisco
- Vehicle(s)
- JL Wrangler
- Thread starter
- Banned
- #1
Love it, tolerate it, or hate it, I've read so many posts here about how ESS won't engage for owners (mostly 3.6L owners like me), and how this has to do with the design, and high numbers of problems (that's anecdotal, not scientific) with the ESS/Aux battery.
Even before COVID, where the far less frequent use of my Wrangler and trickle charging it now makes more sense, I was using a trickle charger to get ESS to enable.
In fairness to fact I'm a relatively infrequent short trips Wrangler owner (COVID or not, just more so given the former,) but I think the system should have been designed to engage, when all the (reasonable) criterion for it doing so (e.g. not on a hill, engine warmed up, [power] steering wheel not turned too much, etc.) were met, as frequently as the vehicle can successfully cold crank for all driver types......not only after a long traffic-less highway trip, where the smart alternator has time to charge the batteries at battery preserving adjustable voltages.
I don't have issue with a two battery design: it makes sense given the potential power draw of (aftermarket) things during an ESS event, and need to preserve the other (main) battery to effect the crank. I have issue with the size, type, and reliability of the factory ESS/Aux battery.
This said: here is the irony as I see it. The EPA sets guidelines, you may not agree with, to reduce ICE emissions, without also (I think?) setting policy for how reliable the systems that effect this reduction (ESS) are. On top of this, although FCA did test their JL product extensively before release, I wonder how much of that testing expressly involved (in know this sounds contrary) NOT operating the vehicle, as a test of battery reliability--or simulating same with battery load devices and/or cold climates, to determine how reliable their ESS system was. In fairness, if they didn't, real blame falls on the EPA if they didn't codify ESS reliability metrics. FCA isn't incentivize to waste money on tests (higher prices for you and me) not stipulated in the CAFE testing rules.
I guess my point is that love or hate CAFE standards, if the EPA was going to enforce them, they're only as good as the reliability of the mechanism used by manufacturers to implement them (in this case ESS), and EPA MPG test runs of a single or few vehicles within a particular make and model is only 1/2 a true test of the reliability of the gasoline saving mechanisms like ESS in that make and model, if those vehicles aren't also monitored by the EPA over the production run of the vehicle for the reliability/frequency of those gasoline savings mechanisms to engage.
Even before COVID, where the far less frequent use of my Wrangler and trickle charging it now makes more sense, I was using a trickle charger to get ESS to enable.
In fairness to fact I'm a relatively infrequent short trips Wrangler owner (COVID or not, just more so given the former,) but I think the system should have been designed to engage, when all the (reasonable) criterion for it doing so (e.g. not on a hill, engine warmed up, [power] steering wheel not turned too much, etc.) were met, as frequently as the vehicle can successfully cold crank for all driver types......not only after a long traffic-less highway trip, where the smart alternator has time to charge the batteries at battery preserving adjustable voltages.
I don't have issue with a two battery design: it makes sense given the potential power draw of (aftermarket) things during an ESS event, and need to preserve the other (main) battery to effect the crank. I have issue with the size, type, and reliability of the factory ESS/Aux battery.
This said: here is the irony as I see it. The EPA sets guidelines, you may not agree with, to reduce ICE emissions, without also (I think?) setting policy for how reliable the systems that effect this reduction (ESS) are. On top of this, although FCA did test their JL product extensively before release, I wonder how much of that testing expressly involved (in know this sounds contrary) NOT operating the vehicle, as a test of battery reliability--or simulating same with battery load devices and/or cold climates, to determine how reliable their ESS system was. In fairness, if they didn't, real blame falls on the EPA if they didn't codify ESS reliability metrics. FCA isn't incentivize to waste money on tests (higher prices for you and me) not stipulated in the CAFE testing rules.
I guess my point is that love or hate CAFE standards, if the EPA was going to enforce them, they're only as good as the reliability of the mechanism used by manufacturers to implement them (in this case ESS), and EPA MPG test runs of a single or few vehicles within a particular make and model is only 1/2 a true test of the reliability of the gasoline saving mechanisms like ESS in that make and model, if those vehicles aren't also monitored by the EPA over the production run of the vehicle for the reliability/frequency of those gasoline savings mechanisms to engage.
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