RomRaider

Probably in about 3 weeks, hopefully, maybe sooner, maybe later. As far as posting more canbus ROMs, I'm a little leary as there appears to be a byte sequence in these ROMs that is possibly unique to the car. I don't know if that can be traced back to the car by a dealership - I doubt it, but I would rather see more ROMs of the same revision and perhaps decipher what it is used for before uploading them.

What address is this possibly unique byte sequence? Since I don't have another ROM to compare my own to...

I just recieved my OpenPort 2.0. I can pull my rom and email it to you guys if you want to get a look at it.

08 USDM Legacy GT Limited 5 MT

Let me know if you would like it.

merchgod I assume you may have any comments on factory tune that caused 08STI recall
http://forums.nasioc.com/forums/showthr ... ?t=1577471
Yesterday, a guy from our local forums said his motor died with less 2k miles. Compression test showed near 0 in 4th cylinder.

I may be on the wrong track here - I haven't completed my disassembler - but it appears that 0xff8, 0xffc, and 0xffaf8 are used somehow. I'm looking at 0x538fc, 0x5390e, and 0x53914, as well as 0xbf06e, 0xbf08e, and 0xbf070. Just tossing that out there.

I outlined the two additional changes to the recall ROM in the Crawford thread (2.5L forum) that the Crawford tuner didn't know about - the rev limit fuel resume boost threshold and the changes to FBKC behavior.

It works like this:
If RPM > 6700 then rev limit fuel cut is active
if rev limit fuel cut is active and RPM <= 6600 and manifold pressure <= 38.7 psia then fueling resumes. This boost threshold is what I'm talking about. The example here is from the initial 08 STi ROM.

if manifold pressure can never reach 38.7psia in the stock tune, wouldn't that last condition be met all the time and RPM becomes the only "trigger"? Or, is it a wording thing?

That is exactly the point. That is how they eliminate a threshold from the decision process - set it to an unobtainable (with the factory tune) value. In the recall ROM, they lowered the threshold back to what every other 32-bit ECU uses (23.xx psia).

What exactly was the "problem" with the original factory tune? That fueling not resuming after hitting rev limit fuel cut or fueling resuming "too soon" when manifold pressure is still high?

Under certain harsh driving patterns, specifically when repeatedly or continuously operating the
engine above the “red-line” (RPM above 6,700), abnormal combustion could occur resulting in
serious internal engine damage in the form of broken piston ring lands. This abnormal
combustion condition is the result of an “over lean” fuel mixture caused by a combination of fuel
cut activation and high turbo boost. To prevent this condition from occurring, Subaru has
developed a modification to the Engine Control Module software logic that will improve
combustion management above “red-line” engine speed. This revised logic will not adversely
affect peak vehicle performance.