First Layer Not Smooth and Grooves After Firmware Upgradew

#1
I just recently upgraded my firmware to the latest and the greats I have an E3D with a 0.8 mm nozzle and no matter how must I adjust my z offset and screws on my bltouch I get grooves on my first layer. I am getting good bed adhesion but groves and most prints I would want a smooth first layer. Any suggestions would be greatly appreciated here are some pictures of before and after my firmware upgrade.
 
#2
Re: First Layer Not Smooth and Grooves After Firmware Upgrad

.8 is a big nozzle. You're gonna have to tune your extruder for it.
You are under extruding badly.
 
#3
Re: First Layer Not Smooth and Grooves After Firmware Upgrad

Thanks I seemed to have got my first layer tweaked good now it took work like you said. Now however I have been getting an error about thermal runaway error please reboot this started after my firmware update also it seems to be on every print any suggestions. From what I see on my LCD before it craps out the temp is just randomly dropping with fan speeds that worked on the old firmware.