Holley electric choke question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71Shortbed · 05-24-2005, 07:13 PM

I just picked up a used Holley 600 with electric choke. Between the choke and carb body there is a red plastic cam thingy mounted on the butterfly shaft. It doesn't appear to be connected to anything but will hold the throttle partially open when lifted. Works like a cam on a mechanical choke. I don't see anywhere that it should be connected to the choke . Am I missing a spring or something?

BULIT · 05-24-2005, 07:22 PM

thats a fast idle cam and there should be a adjusting screw on the bottom and is kinda hard to see and get to

Guy

71Shortbed · 05-24-2005, 07:41 PM

I can see the screw and some notches on the cam but what controls the cam's movement? It just flops around.

Mark

68Stepbed · 05-24-2005, 08:34 PM

It's connected to the windings in the choke bell. It will move freely when the choke is off.

71Shortbed · 05-24-2005, 08:51 PM

Thanks... I guess I got a bad choke. It just moves all the time. Took the choke off and the idle cam just turns on the shaft.

BULIT · 05-24-2005, 09:39 PM

when the choke is cold theres a lever off the back of the choke housing that controls the fast idle cam , when choke is hot the cam will flop around - what keeps it from going to a fast idle when the choke is hot is the weight of the cam itself . hope this helps

71Shortbed · 05-24-2005, 10:09 PM

I think I see how it is supposed to work but what moves the cam so the screw will touch the cam step when cold? Maybe I'm missing a lever. I took it off for pics. Does everything look right? Thanks

05-24-2005, 07:13 PM	#1
71Shortbed Registered User Join Date: Jul 2004 Location: Lilburn, GA Posts: 209	Holley electric choke question I just picked up a used Holley 600 with electric choke. Between the choke and carb body there is a red plastic cam thingy mounted on the butterfly shaft. It doesn't appear to be connected to anything but will hold the throttle partially open when lifted. Works like a cam on a mechanical choke. I don't see anywhere that it should be connected to the choke . Am I missing a spring or something?

05-24-2005, 08:34 PM	#4
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	It's connected to the windings in the choke bell. It will move freely when the choke is off. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

05-24-2005, 08:51 PM	#5
71Shortbed Registered User Join Date: Jul 2004 Location: Lilburn, GA Posts: 209	Thanks... I guess I got a bad choke. It just moves all the time. Took the choke off and the idle cam just turns on the shaft. Last edited by 71Shortbed; 05-24-2005 at 08:52 PM.

05-24-2005, 10:09 PM	#7
71Shortbed Registered User Join Date: Jul 2004 Location: Lilburn, GA Posts: 209	I think I see how it is supposed to work but what moves the cam so the screw will touch the cam step when cold? Maybe I'm missing a lever. I took it off for pics. Does everything look right? Thanks Attached Images

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05-24-2005, 07:22 PM	#2
BULIT Registered User Join Date: Apr 2005 Location: chicago illinois Posts: 23	thats a fast idle cam and there should be a adjusting screw on the bottom and is kinda hard to see and get to Guy

05-24-2005, 07:41 PM	#3
71Shortbed Registered User Join Date: Jul 2004 Location: Lilburn, GA Posts: 209	I can see the screw and some notches on the cam but what controls the cam's movement? It just flops around. Mark

05-24-2005, 09:39 PM	#6
BULIT Registered User Join Date: Apr 2005 Location: chicago illinois Posts: 23	when the choke is cold theres a lever off the back of the choke housing that controls the fast idle cam , when choke is hot the cam will flop around - what keeps it from going to a fast idle when the choke is hot is the weight of the cam itself . hope this helps



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