Default Boot loop help!!!

I rooted kit kat and tried changing my dpi, and now my phone will not boot after the LG logo. It goes to blank black screen and the LED flashes like it does when the at&t logo is displayed. I dont want to loose any data. I tried factory reset via stock recovery but it goes to lg logo to recovery and then back to LG logo and blank screen. It will not factory reset. I can enter download mode. Is there a way that i could adb sideload via download mode to load a new build.prop?