vr 5l wont run correctly or log when changes made to any part of tune

[Damien]

Hi Guys, first time having a play with this setup. ive attached the bin and xdf im using. am i using the incorrect xdf when i make the changes?

[Charlescrown]

It looks like the correct one to me. You will need to change the checksum or any changes will put it in limp mode with a check engine light.
I'm pretty sure you change this to 170. Long time since I last played with it.

[antus]

thats right if you do it with the xdf and the number system is decimal its 170 which is AA in hex or 10101010 in binary (the pattern is why they picked it, I think). but also consider swapping to ose11p which has has more features, is better defined and calculates checksum properly with its xdf. viewtopic.php?f=27&t=3798

[Damien]

Cheers guys, much appreciated getting me sorted. Keen to hit it again tomorrow while it’s still on the dyno