P59 pcm rewrite

[kur4o]

You got couple of options.

1.Buy commercial product
2.Downgrade to `04 7603 OS and use existing xdf
3.Create your own xdf
4.Ask someone to fix basic stuff for you[I guess tunning is not an option here].
5.Use the new open source program called Universal Patcher.

All the options have pros and cons, it also depends how good you are at new technology.

[MrPlumber]

You got couple of options.

1.Buy commercial product
2.Downgrade to `04 7603 OS and use existing xdf
3.Create your own xdf
4.Ask someone to fix basic stuff for you[I guess tunning is not an option here].
5.Use the new open source program called Universal Patcher.

All the options have pros and cons, it also depends how good you are at new technology.

kur4o, appreciate your thoughts.

1. I am assuming you talking EFI Live or HP Tuners?
2. I dont see a downside to downgrading it to a 2004. I engine will be running on a stand alone factory harness. Is there?
3. I not that computer savy..... LOL
4. I may have a local guy that would be able to if #2 doesnt work out.
5. Have you personally used Universal Patcher? I saw it and played with it on various matching bin and xdfs on the site. It says it works when I toy with. But then again I can be blind folded and served a steak but is it really a steak. Maybe a bad analogy. but.....

New 6. Go to the junk yard and find me a 03 04 05 ish pcm and play with it. As I know I need dbw. I dont care what year the os or pcm is.

MrPlumber

[B52Bombardier1]

Hello Mr Plumber,

You can do exactly as you have written above and the 7603 operating system will work just fine. Your engine will start, run, idle and accelerate. My only concern is that your cam swap will likely leave you running somewhat on the lean side and you will need to watch your Long and Short Term Fuel Trims to keep from running a too hot combustion chamber temperature.

You will need to increase your fueling inside of that 7603 tune across many cells in tables within its software. And for that, I have little advice except to say that it can be done within Tuner Pro RT. But I have never done it.

Rick

[MrPlumber]

Hello Mr Plumber,

You can do exactly as you have written above and the 7603 operating system will work just fine. Your engine will start, run, idle and accelerate. My only concern is that your cam swap will likely leave you running somewhat on the lean side and you will need to watch your Long and Short Term Fuel Trims to keep from running a too hot combustion chamber temperature.

You will need to increase your fueling inside of that 7603 tune across many cells in tables within its software. And for that, I have little advice except to say that it can be done within Tuner Pro RT. But I have never done it.

Rick

Bombardier1

I found two separate 7603 bins and xdfs that seem to work with each other and save without a checksum error. One from a 04 corvette. Issue being it is a 5.7 and manual. I found a 04ss truck with a 5.3 and 4L60E. Issue with that is the xdf has a bit of a different layout than that of the corvette.

If I use the 04ss truck bin with the xdf that works with the vette I get checksum errors when saving.

So If I use the universal patcher to fix the checksums. Am I good to go. To rewrite it to my PCM and have a low chance of locking it up?

To me this is the fun stuff as well.

MrPlumber

[kur4o]

MrPlumber,

You can be the guinea pig and open the pandora box of free tuning.

Anyway all freeware tools pose significant risk, since they come with no warranties.
I will even doubt the xdfs, the wireless flash tool and even commercial tools can have errors and brick your pcm with absolutely no money back.

To give you a piece of mind. When the checksums are good the pcm can reflashed.

Just start with junkyard spare pcm and start experimenting.

[MrPlumber]

Yaaaaa..... i like the thrill of testing and Pandora's box. I have programmed things in the past with a computer and hooking items up to it. This just happens to be my first programming of a PCM. Like I said I be mechanically inclined and computer savy. But I can say I am NO computer programmer. You people that are alot smarter than I are around for that.

With that being said my hats off to you folks for all you have done. :)

MrPlumber