My fast idle is way to high, my curb idle is to low. I think the kid who owned the truck before me kept adjusting the fast idle thinking there was only one screw for idle. Anyway where are these screw I use to adjust the fast idle, and the curb idle? Please describe where they are and what they look like.


Here is some pics of my carb

https://i.imgur.com/5P0n7hB.jpg

https://i.imgur.com/D0W8lIc.jpg

https://i.imgur.com/yzcZh1d.jpg

Thanks guys

 

Come on guys, I know one of you knows where the screws are for adjusting fast and curb idle.

I'd appreciate if yall can educate me on where they are and what they look like

 

I'll take pics and post tomorrow when I get home from work.

 

in your last picture the 1 on the inside should be your curb idle cause the screw rest on the carb body, the other should be your fast idle cause it looks like it has a cam the swings down when the choke is closed

 

Cmanka this picture?

https://i.imgur.com/yzcZh1d.jpg


I see two screws in this picture. They both appear to be on the same arm.


Also what screw is that in the first picture I posted toward the bottom of the carb


Justin please post some pictures

 

yes that picture. see the screw closest to the carb it's resting on the main carb body that's your curb idle, the other screw has nothing it's pushing against until the cam plate swings down when the choke is closed after you pump your pedal once. the bottom screw in your first picture is the idle air/fuel adjustment

 

Here are some pics of mine. It's a Holley on my 300 6. The screw under the spring on the throttle arm is the idle speed screw facing the passenger side
This screw facing the driver side is the high idle screw. I set mine at around 1700 rpm

 

By the looks of it we have different carbs, so is there anything special I need to do to adjust my idle. Or can I just raise or lower both idle with a screw driver till I like how it feels

 

im not going too give any tuning advice. I'm just now at 40 years old learning how to tune carburetor. My dad is a genius at tuning and I always relay on him. But he is getting older and it's time to learn he won't be around for ever. But he sets the timing every time he adjusted the carb. Saying that timing and carb adjustment play hand in hand. And he uses a vacuum gauge and a tachometer. And doesn't rest until the idle is perfect and the timing and air fuel mixture is perfect. So hopefully someone with more experience will chime in and explain