Hey everyone,
Got a fast idle problem on my Holley 600. It's on a 302 and it has an electric choke. On cold mornings when the temp is about 30 degrees Fahrenheit, the choke engages, but it is idling WAY too high. I realize that there are two adjustments for idle on a Holley with choke. One for normal idle and one for fast idle. However, I've lost my documentation for the carb and after digging around on Holley's website, I have not been able to locate any information on exactly where the fast idle adjustment is. Can anyone help me out here?

Also, about how long should the electric choke remain engaged? I've adjusted this a little, but I'm not really sure what time I'm shooting for here. Currently it's about 5-10 minutes before the idle backs off.

Any help that you can give me here would be greatly appreciated.

Thanks.

The fast idle speed adjusment srew will be found on the right side of the carburetor, hidden from view by the choke housing itself usually. Look under the choke cap while opening the throttle and you should notice it. To adjust, simply allow the choke mechanism to set (open throttle fully and release), start the engine and adjust the screw until desirable fast idle speed is reached.

As for choke duration, the cap has to be connected to full battery (keyed on/off) voltage to work properly. If it has the correct voltage, choke duration can be adjusted by moving the black choke housing cap (look for marked graduations/rich-lean) until the wanted pull-off is reached.

Thanks a lot. I'm going to check for it as soon as I get home from work. I appreciate it.

-M

Ain't No Problem!

I thought I had a diagram here somewheres. If you have any trouble, just get back.