So, I've read around the web that my 1981 idle speed is supposed be computer controlled and can't be adjusted. The Haynes/Chilton say the same thing. I'm looking at the carb though, and I think there is an idle adjust screw like on every other carb known to man. I have a red arrow pointing to it in the pic below.
The throttle is off the screw because I moved the throttle by hand, so now the choke is closed and, I think, the throttle is being held there by the choke. When the engine warms up, the choke opens and I would think the throttle rests on that screw in the pic.
Am I right here? Couldn't I just turn that screw clockwise and adjust the throttle up?
I'm looking at all this because I brought the car out of storage a month or so ago (was sitting for 4 yrs, ran ok before storing), and it idled low, but ran. I had a shop replace the fuel pump, and I replaced the fuel filter,and the old gas was removed and there is fresh gas in the tank/system.
I found a vacuum leak to the carb and fixed that, but now it will stall when it comes off the choke. I'm thinking to either have the carb rebuilt (hasn't been touched since at least 1993 when I bought the car) or adjusting this screw to see if it will hold idle when warm without stalling. FWIW, it runs fine when on the choke.
![carb w arrow.jpg carb w arrow.jpg](https://forums.corvetteactioncenter.com/data/attachments/13/13259-ac9eb3e0965651d75af641d3e49e1ac5.jpg?hash=rJ6z4JZWUd)
The throttle is off the screw because I moved the throttle by hand, so now the choke is closed and, I think, the throttle is being held there by the choke. When the engine warms up, the choke opens and I would think the throttle rests on that screw in the pic.
Am I right here? Couldn't I just turn that screw clockwise and adjust the throttle up?
I'm looking at all this because I brought the car out of storage a month or so ago (was sitting for 4 yrs, ran ok before storing), and it idled low, but ran. I had a shop replace the fuel pump, and I replaced the fuel filter,and the old gas was removed and there is fresh gas in the tank/system.
I found a vacuum leak to the carb and fixed that, but now it will stall when it comes off the choke. I'm thinking to either have the carb rebuilt (hasn't been touched since at least 1993 when I bought the car) or adjusting this screw to see if it will hold idle when warm without stalling. FWIW, it runs fine when on the choke.
![carb w arrow.jpg carb w arrow.jpg](https://forums.corvetteactioncenter.com/data/attachments/13/13259-ac9eb3e0965651d75af641d3e49e1ac5.jpg?hash=rJ6z4JZWUd)