Ok this is my friends car we swaped the head gasket on it, started it and it ran great has 180 on every clynder. Well he was drivinv it not getting on it or nothing and it made a loud pop and died. Sounded like a back fire when we tryed to re start it it fired up and boged and died. Ecu is throwing code 34/45 knock sencor and injector leak. Turbo set up is just a t25 sr setup. What you guys think ever hered of this? Mayb the injector craped out?

Not something like an intercooler coupling is it?

No i wish but we looked.

Think we might have found the problem. Pulled the front cover and vc founf that the idler gear had came loose and let the dizy jump. Taping threds right now will keep posted.