Just my opinion (keeping in mind I don't tune every day), but I would suggest not changing the pulse tables, instead change the commanded mm3 amount for all your injection events. The ECM keeps track of commanded mm3 rates for all the injection events, if you zero the commanded mm3 then it knows there was no fuel injected for that event, if you still have say 15mm3 commanded but 0uS pulse time, it still thinks there was 15mm3 of fuel injected.