Confused by carbs... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dpetteng · 10-08-2015, 08:13 AM

So, I am a new owner of a 1972 C10. I love the truck.

The last few days she has been running on when the ignition is turned off and I have noticed she has a tendancy to get stuck idling faster than she should even when hot.

I took a look at the carb last night and first noticed that it has what I think is an electric choke but I noticed the wire going to it (arrowed) is not positive at any time.

I also noticed that when cold the four butterflies are always closed. I pushed on the throttle cable and the engine reved but the butterflies didn't open. I also noticed that the back butterflies that seem to be connected to the choke do not move.

I am lost, any advice? Should the choke wire be a switched positive?

10-08-2015, 08:13 AM	#1
dpetteng Registered User Join Date: Aug 2015 Location: Philly, PA Posts: 17	Confused by carbs... So, I am a new owner of a 1972 C10. I love the truck. The last few days she has been running on when the ignition is turned off and I have noticed she has a tendancy to get stuck idling faster than she should even when hot. I took a look at the carb last night and first noticed that it has what I think is an electric choke but I noticed the wire going to it (arrowed) is not positive at any time. I also noticed that when cold the four butterflies are always closed. I pushed on the throttle cable and the engine reved but the butterflies didn't open. I also noticed that the back butterflies that seem to be connected to the choke do not move. I am lost, any advice? Should the choke wire be a switched positive? Attached Images Last edited by dpetteng; 10-08-2015 at 08:37 AM.



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