Steve, I had a similar hesitancy issue with my 07 x type petrol 3.0 I cleaned the Mass Airflow Sensor (MAF) and the Intake Air Temperature Sensor (IAT) and it solved the problem. Both of these sensors are located directly downstream from the air cleaner. There is a video online that shows this process. I didn't remove the MAF as it shows, just opened the butterfly and shot the MAF that way. I bought a pressurized can of MAF Sensor Cleaner at my local auto parts store for about $9.50 This stuff doesn't leave a residue and drys quickly. Try it. It can't hurt and will probably help your performance. If you have one of those nasty oil coated air cleaners, pitch it in the trash and get a plain old paper filter.
Mick
