I have a 99 V6 and I added a cold air intake then i tuned it with a Diablo Predator to run a little leaner. After I then added a throttle body spacer (along with the loud whistle) i noticed my RPM's were getting 'stuck' around 2000-3000 then it will roughly drop to around 1000. My next problem was that my check engine came on for a code 'too lean bank 1' 'too lean bank 2'. So i went back in the Predator and made it richer at WOT. Not only do i not have that code anymore but now my throttle is idling higher and getting 'stuck' longer. Can anyone help?