I installed a new sink and faucet and this thing will be the death of me.
After seating the drain for the 4th time it finally stopped leaking.
Now I was adjusting the mounts for the hot and cold handles. When first installed water ran fine and rather forcefully. Now all of the sudden there is very low pressure and it remains the same flow if i run full hot, full cold, or both hot and cold at full.
did you take the aerator out and flush the faucet out? most of the time when you shut off the valves under the sink deposits inside them gets broken loose, then when you turn them back on it goes into the faucet and usually lodges in the aerator at the end of the spout. unscrew it and make sure get the rubber washer out also, sometimes it sticks in the end of the spout. open the hot andn cold one at a time and see if the pressure is good without the aerator. worst case is the crud lodged in the faucet stem and you would need to turn off the supply shutoffs and remove the stem and clean them but ususlly its in the aerator.