common vacuum leaks on M50?

the saga continues. Since i've had the car it has idled high (at least 1000rpms). It also sounds as though there is a vacuum leak comming from the general area of the intake manifold. There are two hoses that run from the top of the throttle body that are plugged on the other end by the PO... Also, the car will only idle with the MAF unplugged... when i plug it in, the car will start if i stay on the gas, but will not idle. I have tried another MAF with the exact same results. Any suggestions? Is there somewhere that i can get a diagram of the vacuum lines? Thanks.