Exhaust popping!??

[1.6 Sport]

I've got a 1.6 Rsi 16v, and the engine is sounding normal,but the exhaust is popping and reducing pull away? ne ideas plz?

 

[geesus69]

is it possible you have an air leak somewhere in the system?

 

[Mr RSi]

does this happen when its cold and just started the car ? mine does it but once its been driven for 2 minutes it stops .