2008 Range Rover L322 HSE
I have a 2008 4.4 HSE. When idling in driveway and I give a quick press of the gas, it has a slight pause then revs, also when rpms are low and driving at 20-25 mph, occasionally it will give a slight knock/ping. I’m at 112,000 miles. Possible fuel filter or plugs? The throttle body/butterfly is clean. Not sure what to check. No check engine lights.