Quote Originally Posted by Chris Wire View Post
- intake air temp sensor terminal broken off. Could that be a factor?
Sure could. Air temp (= density) determines the amount of fuel to provide.
Still need to double check for a vacuum leak, and maybe I'll do the FSM test on the water temp sensor.
You said this is a fresh rebuild. Any chance you've got an S4 rear iron? That would interfere with the S5 intake and cause a big vacuum leak.