I'm pretty sure that i have fixed the problems that i have been having with my truck's lack of power and rough idle and what not. I started the process of changing the plenum gasket yesterday....got it off and the first thing that i noticed was that i only had half of a throttle body gasket lol.. then once i cracked the intake...the intake gasket was not only stock..(from 98)..it was partially blown out too..along with the bolts being so rusted into place that two of them broke. when i got the intake off and took the plenum pan off, i think that the only part of the gasket left that had not deteriated was one corner and then about 2 inches down the side. so i scraped off all of the gasket material and polished the intake and plenum pan and am in the process of putting it back together today so i'll let you know how it feels later on today! I also did an oil change since it theoretically won't be drinking it anymore lol...i think that was the blackest oil i have ever seen....and it's only been a little over 3 months!