What are you using for a throttle body?

[Matt@BOS]

Originally Posted by INTMD8

The Fast throttle bodies have very small iac ports which limit airflow before the iac motor is out if range. This usually leads to cold start issues on larger cammed engines even after hot idle counts are minimized.

For cable driven or dbw I have the best results with Nick Williams. (If stock is not sufficient size, and it often is)

Well, this explains A LOT. Good info!