Lean Cruise Tables
07-17-2008, 01:09 AM
#62
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If you can enable BDM, you can always program the flash. If you remove the flash from the circuit board, you can place it in any flash programmer and write to it. These methods are not dependent on the seed and key (which are located in the binary in plaintext).
So the professional tuners that have been doing it this way for a while now are hacks and in the end, the customer is happy b/c their H/C LSx is getting high 20's to 30 MPGs....
Good luck with it all and I hope it is worth it. Does seem cool to unlock it on the other platforms though....if this could be done with the LT1s the market would explode, might could convince me to buy what is needed....
Good luck with it all and I hope it is worth it. Does seem cool to unlock it on the other platforms though....if this could be done with the LT1s the market would explode, might could convince me to buy what is needed....
It's actually pretty easy to identify the check provided you have an actual dump of the flash. Calculating the checksum, as discussed, is also simple. The hard part is attaining a raw dump as neither HPT nor EFILive will save in this format.
Does the LT1 have a Lean Cruise option, or were you referring to tuning in general? I would guess that they do not have LC, since the 97/98 LS1 PCMs didn't.
07-17-2008, 01:22 AM
#63
07-17-2008, 07:53 PM
#64
A PCM is "locked" when it is given a non-standard key. The algorithm used to generate the key from the seed given no longer works, so it is not possible to flash it via the DLC under the dash without the new key.
If you can enable BDM, you can always program the flash. If you remove the flash from the circuit board, you can place it in any flash programmer and write to it. These methods are not dependent on the seed and key (which are located in the binary in plaintext).
That is one way of doing it, yes. Some of us like to learn how things work and follow the already-implemented procedures to achieve results, while some people are content with a "hack." I am one of the former.
It's actually pretty easy to identify the check provided you have an actual dump of the flash. Calculating the checksum, as discussed, is also simple. The hard part is attaining a raw dump as neither HPT nor EFILive will save in this format.
Does the LT1 have a Lean Cruise option, or were you referring to tuning in general? I would guess that they do not have LC, since the 97/98 LS1 PCMs didn't.
If you can enable BDM, you can always program the flash. If you remove the flash from the circuit board, you can place it in any flash programmer and write to it. These methods are not dependent on the seed and key (which are located in the binary in plaintext).
That is one way of doing it, yes. Some of us like to learn how things work and follow the already-implemented procedures to achieve results, while some people are content with a "hack." I am one of the former.
It's actually pretty easy to identify the check provided you have an actual dump of the flash. Calculating the checksum, as discussed, is also simple. The hard part is attaining a raw dump as neither HPT nor EFILive will save in this format.
Does the LT1 have a Lean Cruise option, or were you referring to tuning in general? I would guess that they do not have LC, since the 97/98 LS1 PCMs didn't.
don't ask efilive they have no idea.... I have asked them other things in the past and it was clear they really had no clue.
you can make your own interface and download the raw bin. usually there are schematics all over the web. (LS1 specific stuff has been harder to find since so many people used this stuff for $$$ so the guys who did the hard work removed it... but it still is out there) then find a generic software that is compatable for your interface and your set.
I would do this and well if no one has already by the time I get some things done I will)
07-18-2008, 02:39 PM
#65
Id look on piratebay for something. I think i saw something along the lines of someone posting some Script files that do it all for you with efilive software... I dont know where they came from nor are they supported by anything or anyone. You will have to look and see how the cax files work. I posted a thread about the cax file extention a bout a year ago on the efilive forum. It is just an add on that allows an end user to add more tables into efilive if they know addresses for tables/things that arent in the software and you want them in.. You just put them into the same folder of the operating system you are wanting to add them to. 
