Don't panic, the error code 0xF1 can sometimes appear during programming. Try this:
1. Leave the ignition key in the ON position.
2. Disconnect the Gryphon at the OBDII port.
3. Plug the Gryphon back into the OBDII port.
4. After getting to the main screen, wait 15 seconds for needed parameters to be loaded.
If you still cannot program the PCM successfully, contact PHP for assistance.
If things seem to have recovered, try reloading your custom tune and use the Custom Options menu as I described. I would use the 2596 value though. The 55-series tires do not "squish" as much as others.
One more thing. BEFORE you try programming again, make sure your battery is fully charged. With the problems you've been having, the battery could be down quite a bit. (When the Gryphon does not shut off, it pulls a rather large amount of current.)
- Jack
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