Surging and bucking at light throttle

My "new" Range Rover surges and bucks at light throttle and low load, like when I'm trundling through traffic or a parking lot. Vehicle is a 3.5L injected petrol engine with a 5-speed manual.

It feels like a fuel surge to me. Injection issue, maybe? Plugs and wires are pretty new. At medium throttle or higher load it runs beautifully, and if it starts bucking and I give it a boot of throttle it gathers itself up and pulls very strongly, but in second gear at 10mph, very light throttle, it's very difficult to drive. I end up slipping the clutch a lot at low speeds.

Any thoughts on what to check first?

Fuel pump delivery problem maybe? not an expert on these but from past experience a fast mis/splutter was often spark while a more sluggish mis/splutter was fuel.
Bit vague sorry but so many new sensor set ups on these things it could be more in depth, but in general terms my schoolboy list maybe a clue

SmileySteve said:

Fuel pump delivery problem maybe? not an expert on these but from past experience a fast mis/splutter was often spark while a more sluggish mis/splutter was fuel.
Bit vague sorry but so many new sensor set ups on these things it could be more in depth, but in general terms my schoolboy list maybe a clue

Click to expand...

Yeah, and thank you. That sorta jibes with my impression of the issue. It just sorta feels like fuel to me. Also, I drove it more tonight and I notice that the surge is ALWAYS there at light throttle. Even at speed. But in higher gears and at higher speed, it's simply less noticeable. Lower speeds and lower gears amplify the bucking and... it's fairly severe.

Idle air control valve sticking??

Grasping at straws at the moment!