Fast Idle Control System

[Rad856]

I have a 1979 2000 with factory automatic that has been in the family since 1980. Not being too impressed with the power I am swapping to a 1975 carb and manifold at the same time as I am converting the car to the much more appropriate 5 speed.

Can someone please explain the purpose of the fast idle control system and if it is worthwhile trying to have it functional? I see that there is a switch on the trans (that only engages in 3rd and 4th gear, another switch at the clutch pedal and finally a test switch (which I do not plan on installing).

I did a search and find bits and pieces about the system but don’t understand its purpose.

Many thanks in advance.

[blazingspider]

It was an emissions related solution. When activated, the fast idle system set the idle speed higher to reduce emissions when you shifted between 3rd and 4th gear.

[Rad856]

Thanks