Sounds like cam, but NO cam!!!!!

DTT, but i would think that if it was a vacuum leak it would idle and sound like that at all times... My only does it for like the first minute i crank it up. I can run it for an hour and turn it off and crank right back up and it will run like that for a minute or so, then it idles out smooth. It does it no matter if its hot or cold.

QUESTION: While it was in my 91 (the motor) I advanced the timing to 15 degrees. The motor that was in my 93 ( the one i blew up) timing was set at stock. So the question i have is that do you think because i already had the timing at 15 degrees and just stuck it into my 93 and pluggged everything up the computer is still at stock timing.....maybe i need to retry doing the timing.
???

Thanks, Tim

Already cleaned throttle body, does it hot or cold, dont matter, and it takes the same amount of time to quit doing it wether its hot or cold, weither i give it some gas or anything, its almost kinda like its relearning its timing.