crank/cam position sensor
same thing happens on vectras,pretty common for it
my birds car was doing the same thing,no power etc but wasnt the crank sensor,it was the centre section baffles had collapsed and blocked the backbox,hers is a p plate 2.0 8 v too
hope one of those helps
The 8v's dont have a cam sensor do they?
If it was crank sensor surely it wouldn't start at all??? It runs perfect bar not reving over 3.5K...
Exhaust blocked??? Can't see it but could give it ago...