OK---If you did all those things & put the AMNPS over the water pan hole, I sure hope that fan will fix you up. I really think it will fix it, because it seems you have a serious airflow problem.
Todd told me to put it above, where the water pan was...oops , i forgot to mention i also pulled the water pan. Air should come through the chip loader.
Joe
The only thing left is the "Mailbox" Mod.
Good Luck!
Bear