RXG-7

OK i dont know what the heck is wrong but i installed an Apexi AVCR. Worked perfectly and was fine. I recently took my car to get worked on, installed boost gauge, air/fuel gauge, koyo radiator, as well as new spark plugs and worked on some fan issues with the relays. now im not boosting at all, oh one more thing i changed my idle rpm from about 1500 while breaking it in to 8-900. i have not yet reprogrammed the BC with these new idle times, it is reading my rpms fine and the boost gauge on the avcr and regular boost gauge gets to 0 psi and stops???? what is wrong please? the solenoid valve controller is still connected properly, any suggestions from u rotary genuises......do i need to reconfigure the rpm and gears on the avcr? and since puttin in the koyo my add coolant light has come on and a loud noise rings in my car but it has plenty of fluid in it?/ thanks yall. and i just bought a microtech so im trying to figure this out, one more thing, my air/fuel read me running a lil rich, but i havent changed any of the fuel settings?? thanks Ian