Urgent! Factory reset s3 with Cm.10.1 before flashing. Please help.

[ImGoingToRootMyPhone]

Hi all, I recently rooted my device with Odin and Clockworkmod recovery. I installed CM 10.1 ROM on my phone. It worked perfectly but I got bored of it and wanted to try out another mod. So I went on youtube and searched for custom ROMS to my likings. I watched this video AT&T LIQUIDSMOOTH 4.2.2 ROM GALAXY S3 - YouTube and downloaded the ROM in the description. Being a ***** I did not know how to install another ROM so I rebooted my phone into recovery mode and wiped all data and cache. I tried to install the ROM but it failed so I kind of freaked out thinking I screwed up...which I did. I installed TeamEpic root again hoping it would fix everything. The phone booted up to the CM setup as if I just rooted my phone. I set it up and installed Titanium backup to hopefully restore my stuff and start over. Sadly it says "Sorry, I could not acquire root privileges. This app will *not* work! Please verify that your ROM is rooted, and try again. This attempt was made by using "/system/bin/su" command."
I can still operate my phone but I think i messed up...please help. Thanks. EDIT: I also have TWRP.

 

[Golfdriver97]

Welcome to the forums.
You have AT&T as your carrier?

 

[ImGoingToRootMyPhone]

Thank you. Yes. Model number is : SAMSUNG-SGH-I747

 

[Golfdriver97]

Thank you. Yes. Model number is : SAMSUNG-SGH-I747

Most custom ROMs are prerooted, I would just flash a new one. Just make sure it is appropriate for your model number.

 

[ImGoingToRootMyPhone]

Most custom ROMs are prerooted, I would just flash a new one. Just make sure it is appropriate for your model number.

Oh ok. How do I do this? I downloaded Liquid v2.9 and gapps for my device. I am still pretty new to the whole rooting even after reading a lot of threads so it's still quite hazy. What app do I use to flash that will let me access without superuser since I can't.

 

[ImGoingToRootMyPhone]

Most custom ROMs are prerooted, I would just flash a new one. Just make sure it is appropriate for your model number.

Oh no...i bricked my phone. it wont turn on now. i seriusly need help now. please...how do i just go back to stock. rooting isnt for me.

 

[Golfdriver97]

Oh no...i bricked my phone. it wont turn on now. i seriusly need help now. please...how do i just go back to stock. rooting isnt for me.

Can you get into recovery or download mode?

From a Sprint Moto X using AC forums app