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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > GDE Tune (Green Diesel Tune)

TJ Wrangler 4" Rough Country Suspension Lift Kits in JEEP Gear Change Packages From ROCKRIDGE 4WD. We Are DIFFIron Cross Customer JK and TJ Wrangler Bumpers now at ROCK

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Unread 12-01-2013, 11:07 AM   #1006
jediknight
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Quote:
Originally Posted by oldsmoke
Anyone know if our Jeeps have an egr cooling system? The new diesels all have this feature and my suspicion is that the egr cooler soon becomes plugged with soot effectively turning off the egr function but saving the rest of the intake tract from suffering the same fate. I am totally fishing here but how does MB cope with this problem?
Yes it does. We tend to forget that egr cooling system helps out in warming up the engine. Its a good thing especially in very cold weather, but there is a trade off in everything. MB cope with this with the oil (specialized engine oil... Like mobile 5w40 formula M ESP). It helps minimising soot, optimise life of dpf and other exhaust component.

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Unread 12-01-2013, 01:01 PM   #1007
oldsmoke
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Thanks Jedi, I understand that egr and dpf systems are engineered into modern diesel engine management systems. Although my Jeep seems to run nicer with more power since I have modified it, it doesn't seem to heat up as quickly in the cold weather. Why can't I have it all

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Unread 12-01-2013, 04:50 PM   #1008
Red_liner740
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Egr is nothing more than a mandated pollution remover. The faster engine warm up is a beneficial byproduct but the damage caused to the engine and $$$ it costs the owners huge. EPA doesn't give a hoot, they aren't paying it. How does reingesting soot into an engine beneficial in any form?! Why do we run air filters if we are forced to reingest exhaust gasses?

IMO I can't tell a diff between factory EGR function and Eco tune in terms of warmup time.

If u want even faster warm-up, plug it in at night with a timer like I do. Dollar to benefit its probably the best solution. It cuts down on warm up, lowers your fuel consumption, and lowers the start up damage. Remember you do more wear and tear to the engine during that first few seconds of start up and running than hundreds of hours running on clean warmed up oil.
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Unread 12-06-2013, 04:19 PM   #1009
Chucknav
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600 mile tank with EcoTune

I just had my first tank of purely interstate driving (except for maybe 20 miles) since installing the EcoTune and dpf delete pipe. I wasn't in a hurry, so I never exceeded 65 mph for the entire tank. I usually had the cruise set at 64. I got 602.1 miles on 21.698 gallons = 27.7 mpg. This is by far my best MPGs and total miles on a tank I have ever had with this vehicle. Speed kills with this Jeep. If I drive 70 mph, I think it only gets about 25 mpg.

I have been tracking all my fuel ups on Fuelly.com since the EcoTune. My wife and I have averaged 24.3 MPG over nearly 7000 miles. She brings the average down a little. I have driven it exclusively the last 4300 miles and my average is 25.2 MPG. I used to average about 21.5-22.0 mpg before the tune and the best tank average I ever had was just over 24 MPG. The tune definitely has helped my Jeep.

Chuck
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Unread 12-06-2013, 04:56 PM   #1010
SSF556
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Quote:
Originally Posted by Chucknav
I just had my first tank of purely interstate driving (except for maybe 20 miles) since installing the EcoTune and dpf delete pipe. I wasn't in a hurry, so I never exceeded 65 mph for the entire tank. I usually had the cruise set at 64. I got 602.1 miles on 21.698 gallons = 27.7 mpg. This is by far my best MPGs and total miles on a tank I have ever had with this vehicle. Speed kills with this Jeep. If I drive 70 mph, I think it only gets about 25 mpg. I have been tracking all my fuel ups on Fuelly.com since the EcoTune. My wife and I have averaged 24.3 MPG over nearly 7000 miles. She brings the average down a little. I have driven it exclusively the last 4300 miles and my average is 25.2 MPG. I used to average about 21.5-22.0 mpg before the tune and the best tank average I ever had was just over 24 MPG. The tune definitely has helped my Jeep. Chuck
stock?
4x4?
4x2?
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Unread 12-06-2013, 09:10 PM   #1011
Chucknav
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Quote:
Originally Posted by scootr29 View Post
stock?
4x4?
4x2?
See sig block.
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Unread 12-06-2013, 10:00 PM   #1012
SSF556
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Quote:
Originally Posted by Chucknav
See sig block.
OK...iPad/Tapatalk does not show sig lines....
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Unread 12-08-2013, 09:38 PM   #1013
Chucknav
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Quote:
Originally Posted by scootr29 View Post
OK...iPad/Tapatalk does not show sig lines....
oh, sorry. It's a 4x4 QDII with 2" lift and 245/75-17 tires. The tires are 2" taller than stock, but the same width, so I don't think they hurt my fuel economy as much as taller and wider tires.

chuck
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Unread 12-08-2013, 10:14 PM   #1014
WKCRD757
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Quote:
Originally Posted by Chucknav View Post
oh, sorry. It's a 4x4 QDII with 2" lift and 245/75-17 tires. The tires are 2" taller than stock, but the same width, so I don't think they hurt my fuel economy as much as taller and wider tires.

chuck
Chuck,

have you adjusted your speedo for the bigger tires?
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Unread 12-09-2013, 12:41 PM   #1015
Chucknav
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Quote:
Originally Posted by WKCRD757 View Post
Chuck,

have you adjusted your speedo for the bigger tires?
I have not adjusted my speedo or odometer for the larger tires. They are both off about 8-8.5%. I use my garmin gps for tank mileage. On this particular tank, the GPS mileage was 602 and the odometer said 557. I have also verified this with the mile markers on I-79 on my 125 mile interstate commute that I do about once per week. According to the mile markers, when my odometer says I have traveled 92 miles, I actually have went 100 miles.

Chuck
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Unread 12-09-2013, 07:29 PM   #1016
WKCRD757
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That is impressive Chuck. I-79 is not exactly flat either! Do you have a build thread or photos of your Jeep? I'd love to see how it looks with those 245 / 75s

Jeff
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Unread 12-14-2013, 08:54 AM   #1017
Chucknav
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Quote:
Originally Posted by WKCRD757 View Post
That is impressive Chuck. I-79 is not exactly flat either! Do you have a build thread or photos of your Jeep? I'd love to see how it looks with those 245 / 75s

Jeff

Here are a couple of pics. One beside of a stock 4x4 limited in a parking lot. And, one with and without the front air dam.

Chuck
district-2-20120824-00127.jpg   district-2-20120824-00122.jpg   img-20131211-00382.jpg  
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Unread 02-02-2014, 02:24 PM   #1018
james_2k
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just bought and installed the hot tune into the WK and i really like it.

its actually much nicer to drive on the curvy rural roads i live around, takes much less pedal to get up to speed and the extra power and tq is great too.

if i could choose it would be hot tune every day
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Unread 02-14-2014, 11:50 PM   #1019
Supermanbaja
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Knocking/rattling noise after GDE Eco Tune

Quote:
Originally Posted by GDE View Post
For those that have noticed combustion noise in the WK tune, please let me know the following:

coolant temp (cold, warming, or warm)
Altitude
rpm
load

I can adjust the main timing and pilot injection a bit in those zones to soften the noise. The switch over from quiet to loud is when one of the injection events is shut off and the base map switches.

Send us an email with your findings at support@greendieselengineering.com

Thanks
I will log the temp,rpm and send it to you.
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Unread 02-16-2014, 10:37 AM   #1020
sshaughn
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I still don't know how many of your are getting such good gas mileage?! I drive 50-50 freeway/city, I drive fairly conservatively, hardly run the AC, and over the course of the year average 20.5, I usually get 390-440 miles out of tank. I think my best tank on ECO was 520 all freeway, can anymore shed light on this.
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