Electric Choke does not move choke plate? - Chevelle Tech
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post #1 of 19 (permalink) Old Mar 6th, 18, 4:16 PM Thread Starter
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Electric Choke does not move choke plate?

Hey Guys,
I have an electric choke on my Holley 650. When I rotate the black plastic cover to adjust the choke plate, nothing happens. I have been looking for a video or instructions on taking apart the choke, but no luck. Apparently a spring or something inside the choke is not moving the choke plate. Anyone have any ideas on fixing the issue? Maybe a spring inside is loose or fell off. When I hit the throttle, the choke closes all the way and is choking the motor. It will eventually open all the way as it warms up. I did find a PDF from holley, but it is not that clear to me. Thanks

Last edited by cyclerider; Mar 6th, 18 at 4:19 PM. Reason: change wording
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post #2 of 19 (permalink) Old Mar 6th, 18, 4:33 PM
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Re: Electric Choke does not move choke plate?

The choke adjustment must be made when the engine is cold. Holley has a youtube video that will guide you through setting the choke.
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post #3 of 19 (permalink) Old Mar 6th, 18, 4:38 PM Thread Starter
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Re: Electric Choke does not move choke plate?

I am familiar with setting the choke. The issue is that when I rotate the choke cap to adjust the choke plate, the choke plate does not move. I need to have it open a little when I start it because otherwise, it is just choking the motor being completely closed.
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post #4 of 19 (permalink) Old Mar 6th, 18, 4:42 PM
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Re: Electric Choke does not move choke plate?

maybe this will help
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post #5 of 19 (permalink) Old Mar 6th, 18, 4:44 PM
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Re: Electric Choke does not move choke plate?

Remove the choke cap and make sure the tang is engaged with the lever inside of the housing.
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post #6 of 19 (permalink) Old Mar 6th, 18, 4:44 PM
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Re: Electric Choke does not move choke plate?

make sure the plastic cap is attached to the linkage by the internal spring. there is a small loop at end of spring that fits over the linkage arm,
i may be using the wrong part names here, but take it apart , you will see what i mean.
dis connect power first.

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post #7 of 19 (permalink) Old Mar 6th, 18, 5:10 PM Thread Starter
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Re: Electric Choke does not move choke plate?

I'll give it a try. Thanks guys
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post #8 of 19 (permalink) Old Mar 6th, 18, 6:31 PM
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Re: Electric Choke does not move choke plate?

Open the throttle with one hand while you rotate the choke cap with the other. The fast idle cam is engaged when its cold preventing the choke from closing untill you open the throttle a little. There's two reasons you have to hit the throttle when you have a cold engine before you start. One is to set the choke like I've just explained and the other reason is to get a shot of fuel from the accel pump
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post #9 of 19 (permalink) Old Mar 6th, 18, 7:29 PM
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Re: Electric Choke does not move choke plate?

If you take the black cap off you will notice the spring in the cap has a round end on it. This round end must capture the flat blade that moves the choke plate inside the round of the spring so no matter which way you turn the cap the choke should open or close. You should adjust the choke when the engine is dead cold. Hold the throttle plates open by the accelerator linkage and turn the black cap so the choke plate just closes against the carb housing. Tighten the cap in that position and see if it works. When you first start the car it should open the choke plate about 1/8" and open gradually from there as the spring inside heats up.

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post #10 of 19 (permalink) Old Mar 6th, 18, 8:00 PM Thread Starter
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Re: Electric Choke does not move choke plate?

Great information. I greatly appreciate it. Tomorrow is "give it a try" day. Thanks
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post #11 of 19 (permalink) Old Mar 6th, 18, 11:16 PM
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Re: Electric Choke does not move choke plate?

Quote:
Originally Posted by cyclerider View Post
Hey Guys,
I have an electric choke on my Holley 650. When I rotate the black plastic cover to adjust the choke plate, nothing happens. I have been looking for a video or instructions on taking apart the choke, but no luck. Apparently a spring or something inside the choke is not moving the choke plate. Anyone have any ideas on fixing the issue? Maybe a spring inside is loose or fell off. When I hit the throttle, the choke closes all the way and is choking the motor. It will eventually open all the way as it warms up. I did find a PDF from holley, but it is not that clear to me. Thanks
The choke spring has nothing to do in opening the choke plate when you start the motor. It's manifold vacuum that open the choke plate when you start the motor. There is port next to the choke housing, do not plug it. If you do the piston in the choke housing will not work, as a result the choke plate will not open. That piston in the housing forces the choke plate to open to about 1/4" to let the air go in and bring the motor at a high idle. Once the coil is heated by an electric heater the choke slowly open up fully. tap the gas pedal and the idle will drop down. Make sure the vacuum passage to the piston is not blocked.
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post #12 of 19 (permalink) Old Mar 7th, 18, 3:08 PM Thread Starter
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Re: Electric Choke does not move choke plate?

I pulled off the black electric choke cap with the spring inside. It was not connected to the arm that sticks out. I put them back together. One problem. I had to move the choke plate to the full open position, (normal running position) and then pull the little spring tab toward the center of the choke almost a full inch. Now it seems awful stiff. I then turned the cap all the way to the right (to lean it out) and to have it set right, I had to move past the last notch in the choke cap. I then pulled it back to the last notch. I didn't start it up yet as the weather here is crappy. I hope the choke pulls off all the way after it is warmed up. Any thoughts? Maybe I need another black choke cap. Can the spring in the choke cap be moved? Thanks

Last edited by cyclerider; Mar 7th, 18 at 3:28 PM.
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post #13 of 19 (permalink) Old Mar 7th, 18, 3:34 PM
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post #14 of 19 (permalink) Old Mar 7th, 18, 3:39 PM Thread Starter
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Re: Electric Choke does not move choke plate?

Thanks, but I have seen this video several times. Unfortunately, it still does not answer my questions. Thanks
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post #15 of 19 (permalink) Old Mar 7th, 18, 4:02 PM Thread Starter
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Re: Electric Choke does not move choke plate?

Well, the sun just came out. I started up the car. It started up great. Choke came on, slowly went off, idle came up to 1600 rmp's. Choke plate opened up all the way and then I kicked it down and now idling at 850 rmp's. For now, it looks like all is good. Thanks much for all the help. Greatly appreciated.
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