Just put on fresh LIM gaskets on my 97 GTP and now I got it all back together and it has a rough idle and stalls. When I first start it up it will stall unless I give it some throttle and slowly let off and it settles down to a rough idle. I suspected a vacuum leak and smoked the vacuum lines and around the blower and manifold with no change in rpm. Once in a while the idle will go up to about 2 or 3k and settle back down. Unplugging the MAF did not help and the idle stays consistent at 2-3k rpm with the MAF disconnected. The only CEL I am getting is a P0300. Where should I go from here?