Won't kick off high idle

MARCH374

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1979 Aspen 360 w Thermoquad. Car starts fine but idle's high and wont come off high idle unless i push screw down manually. I have cleaned it and even sprayed silicone on it.

What am i missing ? Thanks
 

volare 1977

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Have same issue on a 78. I believe the shaft is worn but I haven`t taken the carb off yet to investigate Already replaced the choke and control. I think the butterflies hang up
 

Mikes5thAve

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Check to make sure all the choke parts are working properly and everything moves freely.

The choke spring and rod could need to be replaced. You can try disconnecting that from the carb and see if it moves as the engine warms up.
 
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