Infection?

[Teamk]

I'm sorry to ask another infection question, but I brewed and kegged a Pilsner recently, it tasted fine before going into the keg, but after force carbing, it has a sour taste. Is this infection or not letting it sit long enough? I sanitized the keg, but there may be a leak in the CO2 intake, which would leave very little chance for any oxidation infection.

 

[Sum1Stu]

Definitly shouldnt taste sour because its young. Although im not knowledged in carbing kegs and co2...im sure someone will stop along soon and answer you GL