Evidently the only part of the tune that does not show being changed is the change of the tire sizes. The change does take effect but it is not reflected in the tune when you go back and review it. Kinda strange. It must be a glitch in the software. Hopefully an update can fix this.

Ideally I would like a custom tune for highway, a tune for high performance (street), and a tune for high performance (off-road). I would also like to know what is changed in the tunes so I can learn how to make changes without blowing my engine.
Thanks for the help.

I have a 2001 6L Suburban with a Whipple Supercharger, Borla headers, and Borla exhaust. Injectors should be GM stock and Whipple Stock. I recently had my PCM re flashed by Diablo. I want to make sure I have the correct tune for the Whipple. I am sending both backup and current tune.
Thanks for ...

I have a 2001 6L Suburban with a Whipple Supercharger, Borla headers, and Borla exhaust. Injectors should be GM stock and Whipple Stock. I recently had my PCM re flashed by Diablo. I want to make sure I have the correct tune for the Whipple. I am sending both backup and current tune.
Thanks for your ...

The Speed limiter, and axle ratio stay changed when i go back a look at the tune. They have "*" next to them indicating they were altered. The tire size has a "*" too but the number under Height is always on 36 and if I set the width/ratio/rim it always says (not set) even after I select apply after ...

I bought a used one, also. I had similar issues. I sent mine to DiabloSport for a $99 hardware upgrade. This solved the problem. Depending on what version you have you might be able to download the update from Diablo. When you boot up your device it will say v2.xx or 6 or v9rxx. The older ones (2.xx ...

After an upgrade to v.9r15 an a reflash of my PCM I am finally up and running.

Although when I try and reprogram my tire size or axle ratio it says it "wrote the vehicle" and to "turn the key off and then on again" then reboot the Predator.

When I go back to the tune the tire size is either back ...

I have tried to change my tire size by Height and by ratio, width, ect... it says that it has updated the tune but when i go back the numbers are still "NOT SET"? Is this normal. Does it not show the updated numbers?

UPDATE: I connected a new battery. I still have the same error "NO RESPONSE> IS IGNITION ON?" I dont know what I'm missing here. The ignition is definitely on. The engine cranks and all lights and sounds turn on when i turn the key.
WHAT A NIGHTMARE!

UPDATE: I disconnected the battery for a half hour. Still no good. No it tells me "NO RESPONSE> IS IGNITION ON?" It is on. I am now charging the battery in a last ditch effort.

HELP PLEASE. ANY INPUT WOULD BE GREAT!!!

Just purchased a used U7198. I plugged it in to my vehicle, it backed up my original flash and let me proceed. I attempted to change tire size and when it tried to upload it failed. My vehicle now, will not start. I get "###ERROR### VIN NOT FOUND". I proceed to restore factory tune and it fails ...