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  #109  
Old 12-22-2014, 11:53 AM
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Re: New ECM/TCM flash coming out

Quote:
Originally Posted by scottg918514 View Post
Even if 4x2, best is 30.
Those are epa estimates. Diesel epa estimates are often less accurate. Unlike gas engine epa estimates, diesels can often get better than estimates.

This flash certainly seems to have affected mpg and overall driveability/feel.

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  #110  
Old 12-22-2014, 11:55 AM
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Re: New ECM/TCM flash coming out

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Originally Posted by TheHangingJudge View Post
Those are epa estimates. Diesel epa estimates are often less accurate. Unlike gas engine epa estimates, diesels can often get better than estimates.



This flash certainly seems to have affected mpg and overall driveability/feel.

Maybe the calculation algorithms the EVIC was using were updated with the flash were updated and now are just more accurate.

Just sayin'


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  #111  
Old 12-22-2014, 01:10 PM
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Re: New ECM/TCM flash coming out

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Originally Posted by 2009RavenR1 View Post
In 2-3 weeks a dealer released ECM/TCM will be coming out.
Okay, I'll admit it: I can't find this TSB/RRT on the WK2jeeps website. I looked for anything that applied to the the 2014 3.0L transmission/TCM that was released after you posted this message at the beginning of October. There were a few transmission updates for the SRT, the 6.4L, and the 845RE, but naught for our vehicles.

The latest salient TCM flash I could find was 21-026-14, released on 27 August... over a month before you posted your message.

Am I missing something, or did this TCM update fail to materialize as promised?
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  #112  
Old 12-24-2014, 02:58 PM
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Re: New ECM/TCM flash coming out

After working with the dealership and jeep corporate, they are not going to do anything to correct my decrease in mpg because it is not a known problem to them. Corporate said no one had complained about the decrease in gas so they have no plans to address this issue until they receive more complaints. I urge anyone that is experiencing a decrease in mpg after the TCM flash open a complaint with jeep corporate. They have given me 5 years of free oil changes to try to make me happy about my jeep getting 5 less mpg.
Doesn't mean much to me but it's better than nothing.
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  #113  
Old 12-24-2014, 03:20 PM
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Originally Posted by Cmweed View Post
to try to make me happy about my jeep getting 5 less mpg.
I can certainly commiserate about low fuel efficiency on an EcoDiesel.

However, you would be better off measuring your fuel efficiency using the European approach of L/100 km, which is notionally like gallons per mile rather than mpg (that is to say, the inverse).

The reason is that if you imagine a 10 mpg vehicle dropping to 5 mpg (i.e. a loss of 5 mpg), that is a substantially different change in fuel economy than a 30 mpg vehicle dropping to 25 mpg. The former is a change of approximately 25 L/100 km, while the latter is a change of approximately 1.5 L/100 km—basically an order of magnitude difference in absolute fuel economy delta when comparing the "same" 5 mpg drop.

Your Jeep will display L/100 km in EVIC if you switch the display mode to metric. You can use this to roughly calculate the cost to travel 100 miles, as 1 L/100 km is approximately 0.5 gallons/100 miles; therefore, a drop of 1.5 L/100 km in efficiency costs approximately 3/4 of the price of 1 gallon of diesel more to travel 100 miles (fuel costs only)... call it $2.50 more per 100 miles currently?

Not that it should mollify your irritation with the drop in efficiency, but at least you can perceive the absolute effect on efficiency rather than having to rely on the misleading mpg figure. I know there's a subconscious element; I'm happiest when I'm cruising at >30 mpg, even though the cost savings might be negligible.
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  #114  
Old 12-24-2014, 05:11 PM
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Re: New ECM/TCM flash coming out

I too noticed a decrease in fuel economy after the 1st reflash, but I do know that this Italian diesel is much more susceptible to the colder temperatures, and the winter blend diesel certainly doesn't help matters either. I'm going to continue to monitor the consumption over the next few months before I make any judgment calls. I took a 1-3mpg hit, most notably on the highway, but like I said contributing factors may effect the outcome as well.


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  #115  
Old 12-30-2014, 06:27 PM
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Re: New ECM/TCM flash coming out

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Originally Posted by Roadkill View Post
I can certainly commiserate about low fuel efficiency on an EcoDiesel.

However, you would be better off measuring your fuel efficiency using the European approach of L/100 km, which is notionally like gallons per mile rather than mpg (that is to say, the inverse).

The reason is that if you imagine a 10 mpg vehicle dropping to 5 mpg (i.e. a loss of 5 mpg), that is a substantially different change in fuel economy than a 30 mpg vehicle dropping to 25 mpg. The former is a change of approximately 25 L/100 km, while the latter is a change of approximately 1.5 L/100 km—basically an order of magnitude difference in absolute fuel economy delta when comparing the "same" 5 mpg drop.

Your Jeep will display L/100 km in EVIC if you switch the display mode to metric. You can use this to roughly calculate the cost to travel 100 miles, as 1 L/100 km is approximately 0.5 gallons/100 miles; therefore, a drop of 1.5 L/100 km in efficiency costs approximately 3/4 of the price of 1 gallon of diesel more to travel 100 miles (fuel costs only)... call it $2.50 more per 100 miles currently?

Not that it should mollify your irritation with the drop in efficiency, but at least you can perceive the absolute effect on efficiency rather than having to rely on the misleading mpg figure. I know there's a subconscious element; I'm happiest when I'm cruising at >30 mpg, even though the cost savings might be negligible.
I calculate my mileage manually and record all fillups. This wouldn't be a big deal to me if I only put 10k mi/yr on my vehicle but I am going to put 30k+ mi/yr on it. Over the course of 5-7 years this is a big loss, the entire reason I paid extra for the "Eco diesel" and bought a JGC. It's not the weather either as I live in the south and it was 60 degrees today. I drive the same route everyday and it is 95% interstate. This drop was immediately noticed after this flash was performed. Once again, if you are experiencing the same drop, please do us all a favor and report it to jeep corporate customer service. At the least you'll probably get some free oil changes. It baffles me that they will not release the oem flash to dealerships and that it is not readily available.
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  #116  
Old 12-30-2014, 06:35 PM
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Re: New ECM/TCM flash coming out

So is there a new flash coming out for this issue in future? Also does anyone know if the 2015s are shipping with this code now?

Took a 2015 out today and got around 10.5 to 11 l/100kms in city driving which seemed quite good.

Thanks
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  #117  
Old 01-02-2015, 10:29 AM
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Re: New ECM/TCM flash coming out

I just got 18-018-14 REV E installed. This was to correct the P20EE-00 which I've had several times. They actually ordered me a new catalytic converter before this new flash came out on Dec. 19th. They are going to just do the flash today and keep the catalytic converter in case it needs it in the future. My prediction is it will :-)

I'll keep an eye on MGPs after this flash.
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  #118  
Old 01-02-2015, 12:46 PM
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Re: New ECM/TCM flash coming out

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Originally Posted by macrophyllum View Post
I just got 18-018-14 REV E installed. This was to correct the P20EE-00 which I've had several times. They actually ordered me a new catalytic converter before this new flash came out on Dec. 19th. They are going to just do the flash today and keep the catalytic converter in case it needs it in the future. My prediction is it will :-)

I'll keep an eye on MGPs after this flash.
Same thing happened to me, they told me they needed to see how much DEF was actually being used vs what the JEEP was calling for and one way meant I needed a new catalytic converter, the other meant a new pump. I was happy when they told me this because it seemed like action was finally getting done. Then they told me about the update and that it is meant to fix all my problems, and I'm not optimistic. I've had the fuel injectors replaced, the line to the injectors replaced, and had to have my exhaust filter manually cleaned because it wouldn't regenerate normally. I'm wondering if I should go ahead an get the lemon law wheels in motion. Definitely keep me posted on your outcome!
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  #119  
Old 01-02-2015, 01:42 PM
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Re: New ECM/TCM flash coming out

On my short drive home, I didn't notice difference in MPG.
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  #120  
Old 01-02-2015, 02:10 PM
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Re: New ECM/TCM flash coming out

Does anyone know which Rev the 2015s are shipping with or is this just a fix for anyone who has issues?
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