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Holley 600 cfm choke issue when warm

Old 10-05-2016, 04:08 AM
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Holley 600 cfm choke issue when warm

I bought a new Holley 600 CFM 4150 with electric choke for my 79 ford F 250 with 400 engine. If I start the truck cold the choke works as it should and after driving 10 or so minutes it runs fine off choke. When I restart the truck after stopping for gas or food it goes back on high idle even with the engine temp at 180 degrees. Should it go on high idle even on a hot day fully warmed up every time i start it? I don't remember my last 600 doing it. Thanks for any help.
Old 10-05-2016, 08:17 AM
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Check the power wire to the choke thermostat to make sure it has a full 12 volts going to the + terminal. Make sure the - terminal is connected to a good ground. Check the setting of the thermostat. Set the index mark on the cap with the center mark on the choke housing. Remove the air cleaner, pump the gas once to set the choke,turn the key on. The choke plate should open as the thermostat heats up. If it doesn't,you could have a defective choke thermostat.
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