Hello,

I had the same problem, do you have a prusa i3 from CTC ?

I have the same printer and had the same problems like you, don't worry I'll help you on it

Try to desactivate the retraction in your software, it'll should do the job but never expect something correct with that stock extruder, I recommand you to take an aluminium one or E3D hotend (even clone) as soon as possible.

Those parts are really cheap, don't worry.

Send us a pic of your printer, it'll help us a lot.