Hello guys i have turbo surging/fluctuation problem with my 1.8t bam engine.
After i rebuild my k04 023 turbo with new wastegate and new internals.
When i got for WOT my boost goes to 1.4bar and then drops to 0.5bar and goes to 1.4bar again and keeps doing it every second/half-second.
Tried checking for vacuum leaks i didn't find any but changed some hoses that didn't seem good.
Also tried with unplug n75 and the boost is 0.3bar constant and no surging/fluctuation but i didn't try with different one.
Before the turbo rebuild the car was good no boost surging/fluctuation or any other issue the constant boost was 0.7.
Burning oil was the reason for rebuild and it fixed it but i get another problem.
Car is Seat Leon 1M Cupra R BAM 225HP full stock
What could be the issue
After i rebuild my k04 023 turbo with new wastegate and new internals.
When i got for WOT my boost goes to 1.4bar and then drops to 0.5bar and goes to 1.4bar again and keeps doing it every second/half-second.
Tried checking for vacuum leaks i didn't find any but changed some hoses that didn't seem good.
Also tried with unplug n75 and the boost is 0.3bar constant and no surging/fluctuation but i didn't try with different one.
Before the turbo rebuild the car was good no boost surging/fluctuation or any other issue the constant boost was 0.7.
Burning oil was the reason for rebuild and it fixed it but i get another problem.
Car is Seat Leon 1M Cupra R BAM 225HP full stock
What could be the issue