Messing with my Holley's secondary idle..

November 26, 2006, 06:24:57 PM

By now if you frequent this board you probably know I'm having trouble since I installed my used Holley carb. But anyway I was leafing through my Haynes manual for some tidbit that may do it for me and I seized on the carb's secondary idle screw on the bottom of the baseplate. According to Haynes this should be set at 1 turn, and it also made a point that adjusting this screw could help if you're having trouble adjusting the primaries (logic being if the primaries are open too much at idle, they could uncover the main metering system and introduce non-metered fuel into the idle mix. It sounded like a promising theory). Upon inspection of this screw I found it wasn't engaged at all so I went ahead and turned it to spec. I fired up the car just now and I couldn't get it to idle below 2000 rpm even with the primary idle speed screw ENTIRELY backed out. Obviously 1 turn is a bit much. Before I go messing with smaller increments I wanted to know what you guys thought.

And just to refresh, the problem I've been having is the car idles fine for 20 minutes and then gets rough and eventually dies depending on the outside temperature. Kind of thing you'd expect with a rich mix.

Messing with my Holley's secondary idle..

Reply #1 – November 26, 2006, 06:38:07 PM

Have you ever visited carbdford.com?

Messing with my Holley's secondary idle..

Reply #2 – November 26, 2006, 06:58:35 PM

Good idea. I'll go there and post about it.