89 chev trk. tbi. what part makes the engine fast when cold?

Answer 1

The computer is adjusting the fuel delivery and timing to warm the engine up.

BTW - 89 trucks with throttle body injection systems (tbi) don't have carbs or chokes.

Answer 2

try a tankful of top rate if that facilitates then probable try chillier spark plugs and see if the knocking is going away. A knock sensor often retards the timing so it would not pass via preignition.

Answer 3

I think you are talking about the choke on your carbuator. This changes the fuel and air mixture untill the car warms up

Answer 4

Fast idle.