how ignition coils can be damaged
 

I think that i have problem with my ignition coils on my (single turbo t04z)fd.
when i 'm increasing boost over 0.7 bar the car cuts power decreasing boost works fine .I 've change ignition coils worked fine for one week then does the same.Is there a possibility to damaged the ignition coils from something in bad condition on my car ? something like ignition .

Are you using an ignition amp with your coils?

no i use the oem ignition coils alone