When I turn my sink on the sprayer blasts first how do I fix this?

When I turn my sink on, no water flows from the faucet, instead it sprays out of the sprayer, but the sprayer is off. Once I pick up the sprayer, and spray into the sink, the faucet then turns on but starts humping and thumping rapidly. I have already attempted a 16 minute system flush and while this seemed promising it hasn't resolved the issue.