I have a 2005/6 2l Petrol
I can't establish a pattern of any kind to this.
The problem is:
Feels like a misfire, but it's only evident on load and with mid range throttle
You can drive the car carefully on low throttle (so long as there are no steep inclines to overcome) and it would be difficult to notice a problem
You can floor the throttle past the mid range and it may cough a splutter, particularly if the revs are a little low, but it will rev through the splutter and go...
Tell you what it reminds me of is: When in the old days, when damp used to be an issue on the HT leads and it would be earthing out to the engine block
But basically it idles nicely and there is no management light on
It's been on a diagnostic but at the time it was running normally. And of course nothing was showing as an issue.
I just did 1200 miles to the very North of Scotland and back home to the Lake District, it was perfect all that time, then suddenly after a brief stopp, the problem started. Was like that for a couple of days covering maybe 150 miles and then it's gone again.
Suggestions welcome. Thanks