I have a moen kitchen sink sprayer that barely works sometimes. Could it be due to low water pressure? Water pressure seems to be fine in the faucet though. It has never really worked.

More details please!
barely works sometimes. just don't get it. Is it clogged and no or little stream? Will it not turn on? What have you done so far? Try this, Unscrew the sprayer from the hose. Point the hose towards the drain and turn the faucet back on. You should have a strong stream coming from the open hose. If not then tell me about it. Back to you, Tom