Main water valve in home turned off to repair bathroom sink leak above kitchen sink. Kitchen faucet with a separate sprayer. The sprayer works well, but removed the aerators and cleaned them. Not much blockage there and it didn't fix the problem. Where shall I start? Ran water outside, close main first. Ran all water in house. All water in house works except the kitchen faucet.

Time to pull the vaklve stem or cartridge. If you tell us a mocedl and brand we can give more details on how to do that