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  #133  
Old 07-01-2015, 10:08 AM
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Re: green diesel engineering tune

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Originally Posted by JEB1 View Post
GDE is based just outside of Detroit. So, I suspect so.


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I'm sure they did, I'm just thinking out loud. We get -20F here. I try not to drive the Jeep on those days, but sometime I might have to.

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  #134  
Old 07-01-2015, 10:54 AM
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Re: green diesel engineering tune

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Originally Posted by chadg2 View Post
I'm sure they did, I'm just thinking out loud. We get -20F here. I try not to drive the Jeep on those days, but sometime I might have to.
Hopefully GDE will chime in and confirm, but I'd be absolutely shocked if cold weather starts weren't taken into consideration. This tune has CLEARLY been well thought out. They know what they're doing, been doing it for a long time and the tune for the WK2 shows that.

When it gets that cold here the only place I go is next to the wood stove.
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  #135  
Old 07-01-2015, 10:58 AM
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Re: green diesel engineering tune

I read somewhere they conducted tests in the Rockies to make sure everything is legit.
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  #136  
Old 07-01-2015, 01:40 PM
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My 07 with the GDE tune started without any issues in below zero Michigan winters. I'm confident WK2 tune will be fine as well.
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  #137  
Old 07-01-2015, 10:32 PM
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Re: green diesel engineering tune

Mail-lady brought me a package today and it was a Hot Tuned ECM from Green Diesel. Inside the box was some very nice stickers and my original ECM I sent to them for tuning. It would've been nice if they would've included a copy of the install procedure steps in the box with the ECM. I printed it off the website and followed it exactly as described. Everything worked perfect until I got to the start and drive ahead 5mph and stop to reset the def gauge. This would not work for me. Since I had to drive at highway speeds to regen I took care of that first. I love these regen messages on the screen. I paid the extra $50.00 for all regen's. I hate not knowing when this Jeep doing a regen. Anyway I only put 42 miles on the new tune so I'm still a Green Horn but I did notice the shifting is very smooth now, but it still shifts down on the hill I drive everyday at 60mph. I can hardly feel it shift now. The power feels good to me, but I never had a problem with the power before. I can't comment yet on mileage since only 42 miles on the OD with Hot Tune. So I will love the regen messages, appreciate the silky shifting, but I'm not sure I can sleep easy over the engine vibration and noise coming from what sounds like the fuel pump area at idle. I have no problem with Diesel engine noise, but this sounds different to me. It's more high pitched and it sounds like the rattle coming from the fuel pump's location. Maybe with all the foam on top of the engine, that is where the sound leaks out? My Jeep has a June 2014 build date and I've never had the computer updated from Jeep since it was bought new(July 2014). If the fuel mileage is as advertized and the regen cycles are much reduced, than I can live with the engine vibration as long as it's not a problem with engine timing. Back to the DEF gauge when I removed my ECM my DEF gauge was exactly at 50%. Installed the tuned ECM and now DEF gauge stays at 80%. I hope the next few ign. cycles gets it back to 50%. One more thing would be nice to have in the box from GDE would be technical support contact information. I understand it's on the website, but it's maybe something they would consider including along with first time setup instructions in the box. More to come.
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  #138  
Old 07-02-2015, 11:19 AM
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Re: green diesel engineering tune

As soon as my Jeep can go 2 full tanks without throwing an engine code, I'll be getting the tune.

Pretty low standard right? 2 tanks would be impressive at this point! On a good note it has always ran well and has suffered no ill effects of all these codes.
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  #139  
Old 07-02-2015, 03:47 PM
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Re: green diesel engineering tune

Is there an ECU removal instruction somewhere? the one on the GDE site isn't detailed enough for me. By my visual inspection, the ECU is mounted to a plate that can be removed by a pushing a tab. It looks like an easier way to get to lower hex screw after disconnect harness.
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  #140  
Old 07-02-2015, 07:52 PM
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Re: green diesel engineering tune

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Originally Posted by stician View Post
Is there an ECU removal instruction somewhere? the one on the GDE site isn't detailed enough for me. By my visual inspection, the ECU is mounted to a plate that can be removed by a pushing a tab. It looks like an easier way to get to lower hex screw after disconnect harness.

Right, push the tab and finagle that plate out to get to the bottom bolt.
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  #141  
Old 07-02-2015, 08:42 PM
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Re: green diesel engineering tune

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Originally Posted by mazster43 View Post
My 07 with the GDE tune started without any issues in below zero Michigan winters. I'm confident WK2 tune will be fine as well.
How did you get your DEF gauge to go back to where it was before you swapped the ECU to Hot Tune? Mine won't go back to 50%.
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  #142  
Old 07-02-2015, 08:46 PM
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Quote:
Originally Posted by chadg2 View Post

How did you get your DEF gauge to go back to where it was before you swapped the ECU to Hot Tune? Mine won't go back to 50%.
Mine didn't change when I put the ECU in. Did you disconnect the battery or just put it in? How long ago did you put on the ECU? It might take a day or two revert back to original readings.
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  #143  
Old 07-02-2015, 11:07 PM
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Re: green diesel engineering tune

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Originally Posted by mazster43 View Post
Mine didn't change when I put the ECU in. Did you disconnect the battery or just put it in? How long ago did you put on the ECU? It might take a day or two revert back to original readings.
Did not disconnect the battery. Followed the instructions from GDE website. Should I have disconnected the battery? Also my cruise control now fluctuates +2/-2 from where it's set at. Never did before even on level it does now. Let me know if you removed the battery cable and for how long before re-connecting it. Just installed the tuned ECU yesterday 7/1/15. Thanks.
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  #144  
Old 07-03-2015, 05:10 AM
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Quote:
Originally Posted by chadg2 View Post
How did you get your DEF gauge to go back to where it was before you swapped the ECU to Hot Tune? Mine won't go back to 50%.
I'm guessing the DEF gauge is about as much of a lie as the temp gauge is on most vehicles (read: an "I did not have sexual relations with that woman, Miss Lewinsky."-class lie).

Remember, the DEF fill gauge is based on a highly insensitive ultrasonic system. Recall the caution that we must add at least one gallon whenever we add *any* DEF, otherwise the system might not sense it? Yeah, I would not be surprised if our DEF gauge is based on some dubious ultrasonic reading followed by "dead reckoning" where the computer subtracts based on how much it believes it probably pumped out/consumed. Such a scenario could be consistent with your ECU swap observations (i.e. perhaps the old computer had some subtracted offset from the ultrasonic reading that the new PCM does not). Personally, I wouldn't sweat about the DEF gauge.

The CC variation you report *would* bother me. I have experienced that on my stock Jeep once: wide open level road, ACC, and it kept decelerating ~10 mph, downshifting a gear or two, hard accelerating back to the limit, coasting back down ~10 mph...
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