well, if you can't stop the leak then you need a new line and slave.

As far as the RPM drop. Are you in gear driving or stopped in neutral?

No more 1337 posts for me.

neutral sir

you've checked for vaccuum leaks? How many miles on teh motor? Injectors are clean? timing and TPS up to spec?

motor is recent rebuild. injectors were cleaned/flow tested but had been sitting for some time after cleaning, i bought them off a club member. timing and tps.. haven't checked them but i am on stock ecu and the same ecu/setup was used without this issue prior to rebuild. vacuum leaks.. pretty sure everything is hooked up right.. is there a reason that vacuum could cause this issue at only a specific rpm? the thought of injectors crossed my mind, but again, why only at this rpm. it would be great if i had more knowledge of the vac system and fuel/timing etc controls that are activated/involved at my problem rpm but im a relative novice :(