loud sucking comming from cai and idles funny.somtimes wont start.also poped and died once and wont start

i hava a 1999 grand prix gtp.i just replaced the motor out of a 2002 gtp. at first it ran fine, but a couple days later it starts to idle high and it start to suck alot of air thought the cai, you can hear the loud sucking noise. i inpluged all diffent sensors and nothing. then i shut it off and restarted it and it ran fine for a minute and then started it again. now it doesn't stop. tried unpluging sensors again and restarting it but nothing idles high and that loud sucking noise just wont quit again.also somtime its latly its hard to start.like went to walmart, came out wouldnt start for like 20 mins then it started that lound sucking noise.also when driving a couple weeks ago it made a loud pop and then died and wouldnt start for like 20 mins again.hopfully you can me