sawyer1 said his did the same thing CJ -- said he was ordering some different diodes and would let me know if they worked or not... thought he may have gotten the wrong one..
one thing to do is ask Tony if his tunes change anything with how much voltage the MAP sensor see's or receives (ie maybe you're putting out so much boost at a lower voltage?!?!)
I have no idea if that is possible... but was just thinking outloud