tt go 300 with truck keeps resetting?

hi all, i have put truck nav 8.398 with map 880 on a go 300, but it keeps shutting down and rebooting, i have tryed older navcores such as 8.393/8.395 but with these it runs real slow any suggestions would be great cheers eddie

You have not installed the Navcore and map correctly.
Without further info it will be impossible to help.

Which info would you need to make it possible to help .

For example what changed before it started rebooting...
Or if you already checked the tutorials for that ? Someone actually took the time to write something about the problem....

hi , From the start i updated the bootloader to be able to use 4gb card. Then used the 8.398 dump from this site.I then loaded the 880 map with the auto installer, Then added some poi's, The tt runs fine for maybe a day maybe two then it starts resseting itself a few times. But with the original car sd card in its absolutely fine. This is the only probem ive encountered after having done a few