i have a 2000 civic si and i got an str throttle body. my problem is that there is a vacuum leak somewhere in the throttle body. i reattached the stock one and the pulsating stopped. i thought it might have been my iac sensor so i replaced and that worked for bout and hour with the str. i also replaced the gasket. i have a aebs intake manifold bored out to 70mm to match up to the str. i posted a topic earlier bout throttle bodies cause i want to get rid of the str if it can't be fixed. any ideas on how to fix a throttle body?

 

ttt

 

Have you tried contacting STR? strpower.com