Old post but what kind of cabel do I need? I have OBD2 but it will only read.
What kind of cable do you need for what? HPTuners comes with a cable.
Old post but what kind of cabel do I need? I have OBD2 but it will only read.
What kind of cable do you need for what? HPTuners comes with a cable.
I want to add to this thread.
I spoke with Dave who owns B&G Performance today for about an hour on the phone. Super nice guy, very friendly, and told me quite a bit of information. Dave worked for Chrysler in the 90s and early 2000s and was one of the original software engineers for the TJ and various other Chrysler powered vehicles.
Because of this, Dave has a wealth of knowledge about these PCMs and how to access them. According to him (and I believe this), he is very well one of the only people in the world who can fully access the PCM on 97-06 TJs (he said he can do it all the way up to 2019 as well though) and have 100% control over them.
Some of the things he mentioned he could do to the PCM are as follows:
The list goes on, but that's just some of what he can do.
- Activate / deactivate SKIM
- Disable post-cat O2 sensors (allowing for cat removal without check engine lights)
- Disable evap system (allowing for evap system removal without check engine lights)
- Disable purge valve (allowing for removal without check engine lights)
- Disable any other emissions
- Change the temperature your cooling fan comes on at
- Fully tune the air / fuel / timing curves
- Change the VIN assigned to a PCM (so you can use it on another vehicle)
- Enable / disable the automatic transmission module on 05-06 PCMs (so you can for instance, use a PCM from a 2005 manual transmission TJ on a 2005 automatic transmission TJ)
He mentioned he can actually tune the PCM even on a stock TJ so that you'll get a bit more performance out of it, and so it will run even better.
You can send him your PCM using this form and he'll tune it (and enable / disable any features you want) for $399, or you can buy the software from him for $599 and do it yourself.
The bottom line is that these PCMs are 100% tunable, we can just blame the misinformation that's been spread on the internet for making us believe that it wasn't possible. I'm very, very glad I looked into this further and decided to spend some of my time pursuing a solution to what many considered to be impossible.
This is actually a breakthrough if you ask me. It will allow TJ owners to keep their vehicles on the road for that much longer, but also tune them the way they want. No need for things like Split Second fuel controllers if you want to run boost, you can just tune the PCM directly and be done with it.
I encourage anyone and everyone to share this information and use B&G Performance for all your needs.
You no longer have to believe the lie that our PCMs are not accessible.
Little late to this thread, but does this mean that the wonky 4 speed auto tranny in the 2006 TJ can be programmed to not be horrible?
Unfortunately I don't think that's the case. At least no one has confirmed it yet so I'm skeptical at best.
So no customizing beyond telling it the TJ has a different trans?
So no customizing beyond telling it the TJ has a different trans?
With HPT You can change upshift and downshift for points for each gear of the 42rle for the 05 and 06 model years. This is confirmed.
Sweet. I wonder if a properly adjusted 42rle would lend itself to a specific gear ratio.
I found that getting the timing table straight makes 42rle works pretty darn good. I rarely turn off the OD and almost always is to controlling speed going down hill on and off road.
I can now personally confirm you can indeed tune a @Wranglerfix PCM with HP Tuners.
If you have a manual TJ, you may need to insert a jumper wire in between pins 11 and 12 on PCM connector C1, or otherwise you will only be able to read the tune, not write it. Took me many hours to figure this out.
View attachment 436977
Not the cleanest job, but it only needs to last long enough to flash the PCM.
You'll need to buy two new credits for your new PCM of course.
I may not need to do this for an 05 w/ Automatic?
I can now personally confirm you can indeed tune a @Wranglerfix PCM with HP Tuners.
If you have a manual TJ, you may need to insert a jumper wire in between pins 11 and 12 on PCM connector C1, or otherwise you will only be able to read the tune, not write it. Took me many hours to figure this out.
View attachment 436977
Not the cleanest job, but it only needs to last long enough to flash the PCM.
You'll need to buy two new credits for your new PCM of course.
Thought process wise, how did you figure out that a jumper was needed there. Super neat that you solved it.
Before the jumper, I could read but not write. After doing a lot of intense googling I found an obscure forum post from 2008 for another car that uses the NGC3 PCM about the same thing. I looked up the pinouts, and sure enough the TJ also had spots at wires 11 and 12, and only some of them had both. Added the jumper, and I was able to write an ultra basic tune (injector fuel/time adjustment) no problem.
Cured my P0172 and P0175 issues I had once I installed the Wranglerfix PCM and now get much better fuel economy. (Those issues were not a result of the Wranglerfix PCM and instead are due to aftermarket injectors.)
In the VCM editor under the "Trans" tab, go to "Shift Scheduling" to view the various shift patterns. The important ones are the "Normal" and "Hot" schedules. Each shift has a tab, ( I.E. 3-4), and clicking on it reveals a table with axis of rpm vs throttle position. It's important to note that the row axis is incorrectly labeled as "Engine RPM". Its not. It's output shaft rpm. Adding something like 200-500 rpm to the lower throttle positions will delay the 3-4 shift notably. The same principle applies to the 2-3 shift. The 4-3 downshift can also be tuned to allow a more responsive downshift from overdrive to 3rd gear instead of having to apply heavy throttle to initiate the downshift.I have an 05 and I have an HP tuners device that I only used to install a stock tune that I no longer use.
Would you mine explaining how I could change the shifting schedule?
I go into OD too soon with OD on (otherwise I wouldn’t turn OD off).
Unfortunately, I go into third too soon when OD is off.
I have an 05 and I have an HP tuners device that I only used to install a stock tune that I no longer use.
Would you mine explaining how I could change the shifting schedule?
I go into OD too soon with OD on (otherwise I wouldn’t turn OD off).
Unfortunately, I go into third too soon when OD is off.