Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: Mr.Pontiac on March 25, 2015, 01:27:53 PM

Title: fast idle working backwards?? advice???
Post by: Mr.Pontiac on March 25, 2015, 01:27:53 PM

When choke is closed and first starting up the idle is very slow and after choke(divorced style) warms up and choke plate opens the car idles very fast??? Any ideas???

Title: Re: fast idle working backwards?? advice???
Post by: Cliff Ruggles on March 27, 2015, 02:56:17 AM

Adjust the choke pull-off so it runs better cold, probably too rich or too lean initial start-up....Cliff

Title: Re: fast idle working backwards?? advice???
Post by: Mr.Pontiac on March 28, 2015, 06:53:28 AM

What seems to be happening is at idle car idles fine at 850 rpm,s minute car is warmed up and move throttle at all when choke is open it jumps to 1500 rpm,s and stays there. Still in choke pull-off area???

Title: Re: fast idle working backwards?? advice???
Post by: Cliff Ruggles on March 29, 2015, 02:44:48 PM

Is the choke raising the fast idle cam when this happens?..

Title: Re: fast idle working backwards?? advice???
Post by: Mr.Pontiac on March 30, 2015, 10:15:19 AM

yes it is, forgive me i am corresponding with owner day by day, Thank You.

Title: Re: fast idle working backwards?? advice???
Post by: Cliff Ruggles on April 08, 2015, 04:31:15 AM

The fast idle cam increases engine speed, when it drops out, the curb idle screw takes over.  Pretty simple set-up....Cliff