I would not feed it the whole XDF. I would create a new XDF and copy over the parameters you want to use with HPT. Never done it before Is there any tutorial ? HP tuners plays with me Now I only changes gears speed and 3sec torque reduction returns back out of blue (I didnt change any parameter rel...

I use the older version of that and it has been rock solid. So I've seen this called out a few places too and I'm wondering if QA or some other change with the SX cable has made them less reliable than the older ones... There is still the very real chance that something unexpected in my setup is me...

The only way that I'm aware of turning on lean cruise on the 7603 OS is through the patch. You can change all the settings in the lean cruise parameters, but it will not do anything unless the patch is used. If you figured out a different way of turning it on, would you mind sharing how and posting...

Tre-Cool wrote: ↑Tue Feb 11, 2025 10:37 pm I know from previous email convo u got this working via the factory os.

but since i got the e38/t42 to t43 worked out, I'll have a customers e40/t43 combo coming in to work out in the next week.

Will post back with how i go.

Did you ever get this working?

Hi guys P59 7603 with lean cruise ON (without patch -just oem settings for 7603) In attempt to tune lean cruise I found that if I press accel fast -AFR drops to lean +1+2 to 'normal' mixture for 0.1-0.5 sec If I drive with 14.7AFR -it goes to 16-16.5 and back to 14.7 and not feels at all as a probl...

Corrupted flash or bad OS would be unlikely to cause a fault like that. You'd be more likely to get nothing at all, working recovery mode or running OS on the bench but other DTCs or functions not working in car. 12.9v battery power rules out the power supply so now its sounding like interface hard...

Has anyone tested this on the GMT360 platform? (Trailblazer, Envoy, etc.)

V8fan wrote: ↑Sat Mar 29, 2025 6:49 am

persingc wrote: ↑Fri Dec 24, 2021 12:18 pm if you do find an error please let me know.

Tried to feed it to HPtuners
No luck

I would not feed it the whole XDF. I would create a new XDF and copy over the parameters you want to use with HPT.

Hopefully I can help you. The files I found have already been modified, so sorry about that, nut hopefully they can still be useful to you.

Good luck!

The issue is these file are being emailed to me so i do not have the physical pcm. Just thought it might be a neat way to fix a locked hpt file. Ive never heard of anyone doing this method before. How do people export a locked tune from a PCM? When I try and read one, it usually tells me that it ha...