If you used flex lines between the valve and the faucet. I would disconnect at the supply valve, and turn the valve on for a second to blow out any debris. If that doesn't solve it, reconnect that and disconnect where the flex line meets the faucet, and again, turn on the supply valve for a second to blow out any debris. If that doesn't solve it, you will have to remove the cartridge and again turn the valve on to blow out any debris. With a Moen faucet, that is easy to do. I only use Moens, so I can't speak to how easy or hard it is with other brands.
