Quote Originally Posted by gscraig View Post
Have you made sure the water supply valves are fully open? Saw that one just recently on Ask This Old House.
Possible, IMO. Wouldn't be the first time this happened either.

On a related note, a malfunctioning diverter valve to a sink sprayer could also theoretically produce these symptoms.

So could a loose washer in a stop valve......or even in the faucet itself..if it has washers.