Having feed problems

[joeb]

Greetings
I have recently run into a problem with the feed when printing
I get the small clean strip when it first starts then nothing
It goes thru the motions of printing but nothing extrudes
I can get it to extrude under maintenance program and it will then print sometimes - just run extrude 4 times with no success
I am using genuine PP3D filament \Any ideas
cheers
Joe