But Mad North-Northwest
Join Date: Sep 2003
Location: SF Bay Area, CA
But what I don't understand is - why is it Ok with the current settings when warm and not ok when cold.
When the engine is cold you need a more open throttle to maintain the same idle RPM. The L-Jetronic manages this through the AAV, that lets in more air when cold and closes when the engine heats up. The Motronic does the same thing through the IAV.
In both cases, though, the throttle plate (and idle air bypass in the case of L-jet) need to be set right or there still won't be enough air to cold idle.
1963 Giulia Spider (1750 engine)
Former: 1987 Milano Gold