My Astra G has had a VXR turbo fitted to it today after being informed by a local VX dealer that the wastegate had gone on the original. Before the new turbo was fitted I had a p1106 fault code and little to no boost.
The new one has been fitted but the fault code came straight back within minutes of leaving the garage (different one to the one who diagnosed). Also, on the way home, the car lost all power on the motorway but after switching off and on again it is fine and has not done it since. I now have p1106 and p1600 fault codes on my ecu.
I'm not 100% convinced that the actuator on the new VXR turbo is set correctly for the Z20LET. From doing some more reading I'm also wondering whether it being set incorrectly like this could be the reason I'm getting these fault codes??
Please see image below and let me know if:
a) it looks correct
b) it could be the reason for the fault codes
I had also changed the front bcs, afm and checked boost and vacuum hoses for leaks. When I took the car back to the garage today they also tried a new MAP sensor but it made no difference.
I'll be going back to the first dealer who diagnosed the fault tomorrow but want to rule out the actuator being set wrong before I do that.