high bouncing idle and p0300 after intake mani removal...
 

hey guys, so i had a spare intake manifold with a dual pass endplate and a spare blower with a 2.8 pulley i just installed (already had 60s and zzp tune).. after instalation the car starting idleing really high and bouncing up and down with obvious misfires.. my intercepter read a lot of misfireing and code p0300 came up.. so i thought this was because i reused the intake gasket but after installing it with a new one the same thing happened.. i then tried using rtv black on the gasket and still doing it. the car doesnt read misfires under boost which most likley means its a vacuum leak.. im trying so hard to find this leak but cant for the life of me find it.. what is an easy way to find out the problem? thanks.

also i used my original throttle body and sensors.

so update. i tried blowing smoke in the system and spraying the areas with throttle body cleaner with no luck.. but when i moved one of the injectors alittle bit the idle went up a bit. could i have damaged an injector insulator? any way of testing it? no smell of fuel.