I've recently had a similar problem
Strong smell of unburnt fuel on start up
Tickover rough and usually stalled when I tried to pull away, then wouldn't start.
Down on power and would give symptoms of running out of fuel when on overrun at motorway speeds.
Seemed to be running really lean and probably wouldn't pass the emissions test.
Turned out it was a failed lambda sensor!!
911 sport in Horncastle sorted it and it's been fine since, I've even done 2,000 miles in Europe without a single misfire.
Hope you get it sorted soon.
Strong smell of unburnt fuel on start up
Tickover rough and usually stalled when I tried to pull away, then wouldn't start.
Down on power and would give symptoms of running out of fuel when on overrun at motorway speeds.
Seemed to be running really lean and probably wouldn't pass the emissions test.
Turned out it was a failed lambda sensor!!
911 sport in Horncastle sorted it and it's been fine since, I've even done 2,000 miles in Europe without a single misfire.
Hope you get it sorted soon.