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Topic Review (Newest First)
01-04-2014 05:03 PM
bryals21 An addendum to my post: Something happened when the unit locked up. I have an automatic transmission and it would not shift out of 2nd. Also, many other functions stopped working. I uninstalled and re-installed the software and tune several times without resolution. I unhooked the battery for 8 hours hoping it would reset the ECM without any luck. I then had an epiphany and remembered when I originally installed the software that I had left everything on default. I checked and it had defaulted to an axel ration of 3.73:1 rather than 4:1. Once this was changed, the tune restarted and almost everything worked. The transmission wouldn't shift to 4th or 5th still. I uninstalled the bully dog from the ECM to return to stock. Now everything computer wise is running like the day I bought the vehicle.

Tomorrow I am going to start from scratch as if I just opened the bully dog unit. Maybe with knowing it may not default to the correct settings it will install more smoothly.

On a side note, my father got a unit for his 2010 Rubicon unlimited and used the default settings without any difficulty. It was a smooth install. He has been using his for about 2 weeks and no issues.
01-03-2014 01:52 AM
bryals21 I just installed my Bully Dog last night. I haven't gotten to try it out yet. One thing I was interested in is the MDS and dropping to 4 cylinders in ECO mode. I haven't seen people mention this on the forums or if it works well or at all; nor how to turn it on.

I used a Mac to update the software without any problem. I did have the unit lock up in the finishing stages of installing the tune. I turned off the key and unplugged the device. After rebooting everything, it reinstalled my stock file and I had to reinstall the tune. No problems with the reinstall.
09-17-2013 09:13 AM
derf
Quote:
Originally Posted by Captain Ed View Post
Aggressively turned off the GPS

So did you buy a new one yet?

Nice write up. I enjoyed reading it and even though I have an automatic and my dashboard says I get real good gas mileage I would be interested in the tuner. I still really don't care about mileage but more so performance.
I haven't bought a new one yet. I will at some point.

Unfortunately, I still haven't been able to get any word from Bully Dog about fixing the throttle sensitivity problem in their performance tune. I may go and download the latest software update and try it out to see if they fixed it. Unfortunately I just filled the tank with low octane gas last night so I'll have to wait until I burn through that tank before I can do it.
09-17-2013 07:40 AM
Captain Ed Aggressively turned off the GPS

So did you buy a new one yet?

Nice write up. I enjoyed reading it and even though I have an automatic and my dashboard says I get real good gas mileage I would be interested in the tuner. I still really don't care about mileage but more so performance.
07-24-2013 03:21 PM
Jstraw Will it void your warranty if you don't use the tune? I just want to use the TPMS, sway bar, and locker features...
Anyone have experience with the hypertech? They want you to plug a box into the cam, map, and throttle sensors... I wonder if they are bypassing a PCM tune which would keep the dealer in the dark if it were removed?
07-23-2013 07:43 PM
Muddr1 Thanks for the input.
I am still under the impression that a set of gears would do better than a tuner. More money I agree, but from what I have read about tuners, the gear change still seems to hold more value.

I could be wrong, and I am not here to start a flame, just throwing in my 2c.
Also as far as warranty is concerned, I have a 5 year 100,000 mile warranty, as do most. and I feel if anything went wrong with the powertrain, and they find out you have a programmer, they will find any reason to deny you warranty.

For that fact, for me, its not worth that gamble. I will wait the 5 years, hopefully the programmers will improve, and go from there.
Again, thanks for posting your results. And I hope you are getting the results you are looking for.
07-23-2013 05:50 PM
pickupman2500 thats pretty cool
07-23-2013 05:01 PM
kyvtx1300 BullyDog GT Mount:

I pulled off the suction cup and used a nylon tie to attach it to the recess for the sun visor.
06-27-2013 09:49 PM
mjpjr45
Quote:
Originally Posted by derf View Post
My JK isn't a Rubicon so I can't do that. But I did forget to add an update.

The new gears are in along with the new tires. I went with 4.56 gears and 315/70R17 tires (35's).

When we finished the gears it was trivial to tell the computer about them by reinstalling the tune. The tires were put on a week later. If you put in 35" or even the advertised 34.x" diameter your speedometer will be off. Instead, I just went ahead and left the factory programmed size alone. I hooked up the GPS and got on the freeway. I got up to 60MPH according to the speedometer and noted what the GPS said I was doing (right around 64-65). So I broke out the calculator on the phone and did a little arithmetic. The computer said the tire size was 31.1". So I plugged in the numbers: 31.1 x 64.5 / 60 = 33.4325. I used the programmer to get as close as I could to that tire size and reinstalled the tune. Took it out on the freeway and it's as close to exact as I could probably make it.

I did a little bit of mileage testing with the economy tune. Now that I have decent gears to match the tires, I was able to run in 6th gear at 70 and get up hill without slowing down. On a comparatively short run I was able to get around 18 MPG with the cruise set at 70. I need to run a longer route to make sure that holds up. On the return leg I went on a back road and had the cruise set at 55. I was able to pull about 21.5 MPG on that run. But again, I need a longer run to confirm that number holds up.
I had to do something similar with mine. My tires measure out at 33.25" and I have 4.10 gears. Well I inputted 4.10 gears and 33.25 for the tires and was off. I used my GPS and figured out what I needed to input. It worked out to 32.9" tires with the 4.10 gears and I am now dead on with my GPS.

Still not running a tune though. I haven't check Bully Dog's updates. Anyone running either tune and have normal throttle? Mine premium tune was too sensitive and my regular tune was too sluggish.
06-27-2013 01:41 PM
JeepHerz So......
Did you drive much with the new gears/tires but no programming (aside form tire size input)? I was looking at BullyD's tuner before I swapped to the same set-up you have- but the re-gear fixed my problems for the most part. In reading your comments is it a fair assumption to say that is increases MPG, but not performance? Due to the sensitive throttle in performance mode? Still waiting for someone to break Jeep's security protocol and allow shift point programming but I am wondering if that will ever happen.
Thanks for the excellent write-up and commentary.
06-27-2013 12:07 PM
ElectricJay Thanks for sharing. Very interesting. I've been on the fence about products that could void a warranty. However, the dealer I take my Jeep to, when I ask about installing after market parts and accessories and that voiding the warranty; there response was, "You'd have to prove that the modification you made caused the problem in order to void the warranty." (BTW- didn't buy my Jeep from this dealer)
06-27-2013 11:17 AM
derf My JK isn't a Rubicon so I can't do that. But I did forget to add an update.

The new gears are in along with the new tires. I went with 4.56 gears and 315/70R17 tires (35's).

When we finished the gears it was trivial to tell the computer about them by reinstalling the tune. The tires were put on a week later. If you put in 35" or even the advertised 34.x" diameter your speedometer will be off. Instead, I just went ahead and left the factory programmed size alone. I hooked up the GPS and got on the freeway. I got up to 60MPH according to the speedometer and noted what the GPS said I was doing (right around 64-65). So I broke out the calculator on the phone and did a little arithmetic. The computer said the tire size was 31.1". So I plugged in the numbers: 31.1 x 64.5 / 60 = 33.4325. I used the programmer to get as close as I could to that tire size and reinstalled the tune. Took it out on the freeway and it's as close to exact as I could probably make it.

I did a little bit of mileage testing with the economy tune. Now that I have decent gears to match the tires, I was able to run in 6th gear at 70 and get up hill without slowing down. On a comparatively short run I was able to get around 18 MPG with the cruise set at 70. I need to run a longer route to make sure that holds up. On the return leg I went on a back road and had the cruise set at 55. I was able to pull about 21.5 MPG on that run. But again, I need a longer run to confirm that number holds up.
06-27-2013 10:45 AM
terrabit Has anyone used the bully dog to engage lockers or swaybar disco in 4 hi?
06-16-2013 01:57 AM
C-Ron I have a 2011 and my install went great, no issues installing tunes. I changed tire sizes about two weeks later and doing so was also easy. I have the premium tune on and while it doesn't feel significantly faster, it does drive better IMO. Also shifts way more smooth. My wife noticed that right off the bat.
06-12-2013 12:23 PM
TheWolfen
Quote:
Originally Posted by Dave2011 View Post
My 2011 won't take the program. Keep getting error code 295. It does display all the temps without reprogramming. It's the weekend so for now I have a $500 digital readout....
Hopefully you've gotten this fixed by now. I had the same problem with mine and my 2011. They sent me a manual update and now it works great! Love mine, although the jury is still out on any mileage improvements.

One feature I hope they add someday is direct throttle sensitivity adjustments. It is the one feature the Diablo has that I want. The GT had everything else, though, which is why it was on my birthday list!
06-02-2013 08:35 AM
Dave2011 My 2011 won't take the program. Keep getting error code 295. It does display all the temps without reprogramming. It's the weekend so for now I have a $500 digital readout....
04-25-2013 06:26 PM
derf
Quote:
Originally Posted by C-Ron View Post
Does this tuner require you to plug into a pc running windows?
I'm not sure. I used a Windows computer when I did my update. And you will want to update the files to the latest version when you get it.

I want to say that you can do it from a Macintosh if that's what you have but don't quote me.

Though really, if you talk directly with tech support they can email you a zip file with the stuff you need. Then all you need to do is mount the flash card with the USB adapter they provide. Then you can unzip the files and copy them over to the drive. So if you're a Linux kind of guy, this option would work just fine.
04-25-2013 04:54 PM
C-Ron Does this tuner require you to plug into a pc running windows?
03-29-2013 05:56 PM
derf I finally got with the tech support people at Bully Dog. They had me update the files on my tuner to the latest version. This involves returning the vehicle to stock, copying files onto the flash card (you can use the update agent) and then reprogramming your vehicle.

Trouble is, the throttle sensitivity is still unacceptable on the Premium Tune. It still surges when you even breathe on the pedal. I'm going to go back to the Regular Tune until I hear back from them on updating the tune to mellow out the off idle throttle sensitivity issue.
03-27-2013 01:46 PM
derf If you want to pay me for my time and gas I'll do whatever tests you want...
03-27-2013 11:42 AM
jadmt
Quote:
Originally Posted by Grind View Post
In the spirit of being completely objective, do you think that the gains in fuel economy you saw may have been the result of paying more attention to your driving habits? I mean, a stock Sport S getting 16 mpg is pretty low. Changing driving habits could easily cause a bump to 19 mpg. Do you think it's possible that you could drive in a fairly normal manner and still get 16 with the tuner in?
yup could be windage changed and elevation etc too many things without doing a controlled loop exact conditions run. I know on mine it is easy to vary 2mpg just by how I drive or how the wind is blowing or what direction I am driving. I can drive to the east and slowly gain 2000 feet of elevation without realizing it and when I turn around loose the same 2000 feet. guess which way gets better mpg.
03-27-2013 10:59 AM
chipmonk66gt I still don't see or haven't been convinced this thing is worth it. In fact I maybe convinced it doesn't have added value. Please keep testing and let us know.
03-27-2013 10:59 AM
derf
Quote:
Originally Posted by Grind View Post
In the spirit of being completely objective, do you think that the gains in fuel economy you saw may have been the result of paying more attention to your driving habits? I mean, a stock Sport S getting 16 mpg is pretty low. Changing driving habits could easily cause a bump to 19 mpg. Do you think it's possible that you could drive in a fairly normal manner and still get 16 with the tuner in?
I drove exactly the same way going down and coming back. Granted, I was pushing 75-80 most of the way and that really kills your mileage but it was the same 75-80 before and after.
03-27-2013 10:57 AM
derf
Quote:
Originally Posted by Tweak View Post
I recognize that plate, arent you with DFW-Tx4wd?
I was when I lived in Fort Worth. I moved for a job but I was down for Megarun this year. I needed to get out of the snow for a weekend.
03-27-2013 05:45 AM
Grind In the spirit of being completely objective, do you think that the gains in fuel economy you saw may have been the result of paying more attention to your driving habits? I mean, a stock Sport S getting 16 mpg is pretty low. Changing driving habits could easily cause a bump to 19 mpg. Do you think it's possible that you could drive in a fairly normal manner and still get 16 with the tuner in?
03-27-2013 01:07 AM
Tweak I recognize that plate, arent you with DFW-Tx4wd?
03-26-2013 10:38 PM
mjpjr45 Cool I check back, for updates.
03-26-2013 09:36 PM
derf
Quote:
Originally Posted by mjpjr45 View Post
OK I meant the roads near my house.

I ended up running the Premium fuel tune for a few days and went back to stock tune. The Premium tune made the throttle too sensitive. When driving at a steady pace, if you lifted for any reason, getting back on the throttle, no matter how easy you try would cause it to jerk a bit. Like it was opening to quickly. I just didn't like the way it felt. I also couldn't really feel any difference in power.
I had that problem with the premium tune too.

However, I did notice that there was a lot more consistent power in the low end and it did just a hair better holding speed up hills.

I couldn't stand driving it with that sensitive throttle so I removed the tune. I'm going to try calling Bully Dog on Friday when I have some free time and see what they have to say.
03-26-2013 05:19 PM
mjpjr45
Quote:
Originally Posted by scottmphoto View Post
Dude. HOW BIG IS YOUR HOUSE!!??

OK I meant the roads near my house.

I ended up running the Premium fuel tune for a few days and went back to stock tune. The Premium tune made the throttle too sensitive. When driving at a steady pace, if you lifted for any reason, getting back on the throttle, no matter how easy you try would cause it to jerk a bit. Like it was opening to quickly. I just didn't like the way it felt. I also couldn't really feel any difference in power.
03-26-2013 04:06 PM
Osage Orange
Quote:
Originally Posted by jadmt View Post
I read on another forum that you can program it to run on 4cylinders when the eco on light comes on (3.6L). Anybody try this?
Interesting question. Bully Dog website states Yes for MDS (4 CYLINDER MODE) function on 2011 3.8L and 2012-2013 3.6L VVT.
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