Its a 1992 B4C Camaro with the 5.0 tpi when i go to start the car it takes some time for it to start, after it does start it idles very high like 2500 rpms then when you hit the gas it is very sluggish and misses out. The car was running fine two days ago and all of the sudden this, i also hear a psssssst sound under the hood. PLEASES HELP!!!

 

sorta sounds like a vacume leak (the psssst sound), check your vacume hoses and such. i could be wrong though, but it always helps to check the simplest stuff first