Originally posted by GMATT:
Mine's definitely a cool weather moose. Really bad when it's below 40 - gotta do the TH fix. I took it out when the weather got warm again.
Oddly enough, mine does it more at higher altitude, and when it's warm. It's almost always when I'm rev-matching on a downshift. Revving again will make it "go away" almost immediately - so it's definately IAC related.
Annoying, but not sure I want to fix it as I'm probably trading it in for a Prius (much better gas mileage). I'll miss the performance, but not the thirst for premium in Orange County.
-Rick
'99 SVT - 44700 miles.