Turbo Boosting But Giving Now Power?

[DVS JEZ]

Pull number 1 coil pack out and use a spark plug lead between the spark plug and the coilpack, then connect the timing light to this. I have noticed the loop can give readings 15degree's out.

Check the alignment the inside the cas. If this is aligned the cas should be close to centre of the bolt holes.

Check the bracket that holds the cas (will have to remove top timing cover) i had similar issue's with a car the other week and the bracket was broken/cracked almost in half.

[R33 Eddy]

second hand CAS produced same problem, car is now going to the tuners as I think the timing belt was out before and the tune was done to the timing being out.

I have a stock ECU but dont have the stock AFM otherwise i would have used that to check timing.

Will post back what happens at the tuners but they think they will have it sorted in 2 hours.