When operating the faucet I either get a reduced flow from it or it will run normally then stop but I still have full pressure in the spray head.
The aerator is clean

Shut the water off under the sink and open up the inlet ports, Now place a pan over the open valve and turn the water on fro a few seconds to flush out the supplies. Reassemble and test, Good luck, Tom

Shut the water off under the sink and open up the inlet ports,. Now place a pan over the open valve and turn the water on fro a few seconds to flush out the supplies. Reassemble and test, Good luck, Tom

Hi Tom,
Thanks for your prompt response and advice, I did find the issue, inside the spout assembly there are is a white plastic washer and a black rubber sealing ring, the white washer was damaged allowing the sealing ring to drop down over the water ports for know I have remeoved the ring and will look to either get a complete spout assembly or if possible a replacement washer
Thanks again Daz

Clear the spout and contact Moen at, Call: 1-800-BUY-MOEN (1-800-289-6636)
8:00 am to 8:00 pm Monday through Friday
8:00 am to 6:30 pm on Saturdays EST
Closed on Sundays and all nationally observed holidays.
To contact Moen Canada call: 905-829-3400
Ask foe a new cartridge, They will send you one for free. Good luck. Tom