I just re-programmed my 2004 H2 with the diablo predator "Performance Tune" file.
I can only find 90 octane fuel here in Albuqueque (predator manual specifies using 91-93 octane, with the "performance tune").
Should I change the program back to the "87 octane file" or leave it as is. It runs fine and I don't hear any detonation?
Also, it still shifts down more than I would like it to during cruise control operation (75-80 mph) when cresting hills, is there anything I can do with the "modifying Parameters" function to help this?
Thanks in advance.
Jon
Albuquerque, NM, 2004 H2
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