Injector d/c way too high... need help

[driftn1g]

Ok as far as i understand, anything over 80% duty cycle on my injectors is too much right??
Im getting about 93% d/c at 15psi ZERO KNOCK on stock 14b with 255lp pump and 550cc injectors and MAFT setup.. three things popped up in mind, one was i have boost leaks, but wouldn't i see knock on my logger at high boost levels?? another thing is clogged fuel filter which yet needs to be changed.. or is it that MAFT setup sucking in all that air demanding more fuel??

thanks
alex