5.3 basic mods?

[bottomline2000]

well, I seem to have found the problem and lucky me it probably only affects the 2000-2001 NBS trucks. This is exactly what mine does and it seems it IS tune related.

http://www.performancetrucks.net/forums/showthread.php?t=465926&highlight=efan+running

I'm out this thread..on to blackbear to see what can be done. .Thanks Tracy!