switched intake now it runs crapy.....Help!!

[1SLO306]

i recently change my intake back to stock cause i need money and sold the TFS street heat. What should i plug the unused holes with on the stocker?

 

[giddyup306]

Put a vac gague on it and see if it has a leak. Thats my bet. Or sparay carb cleaner and look for leaks.