Electric choke issue
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Cargo Master
Joined: May 2009
Posts: 2,587
Likes: 47
From: Eagle River, AK
Electric choke issue
Over the last few days I have been trying to get my electric choke and high idle set and I am not sure if I am making this harder than it needs to be or not.
I was getting close to having it dialed in and now the it seems the electric choke does not open all the way and the idle does not drop down as it did a few days ago. I still need to do some investigating behind the choke cap and see if power is coming from the stator wire as it should.
I thought it a bit weird that it was an all of the sudden change though.
If everything looks to be in order behind the choke cap, I may power through a full 12v source and see if that works.
Please throw out any other ideas of things to check.
The set-up:
Stock reman 360
Edelbrock Performer 390 intake
QuickFuel carb (choke powered through stator wire of the 3G alternator)
I was getting close to having it dialed in and now the it seems the electric choke does not open all the way and the idle does not drop down as it did a few days ago. I still need to do some investigating behind the choke cap and see if power is coming from the stator wire as it should.
I thought it a bit weird that it was an all of the sudden change though.
If everything looks to be in order behind the choke cap, I may power through a full 12v source and see if that works.
Please throw out any other ideas of things to check.
The set-up:
Stock reman 360
Edelbrock Performer 390 intake
QuickFuel carb (choke powered through stator wire of the 3G alternator)
Lead Driver
Joined: Jun 2006
Posts: 5,641
Likes: 966
From: Near Yosemite CA
#1 make sure it gets the full 12v,,, when I did mine, I left it outside, so Sat. morning I went out and loosened screws, turned choke housing until it was closed with just a tad more of a turn. Never had a problem since. BTW it was winter and about 25* outside. I would get in, punch it to floor once and turn the key, fired up EVERY time, idled about 1200-1400 for a min. or two, then I would give it a "punch" and it would idle down and be happy. Was on a 300 I6, Offenhauser intake and Holley 390cfm carb. My Edebrock 600cfm I did the same way on my 77 with 351Measly.
Elder User
Joined: Sep 2014
Posts: 862
Likes: 7
From: like subarctic, brrr man!
Careful with that 12 volts to electric choke business!
Some fords use the electric off the alternator stator which puts out 7-10 volts AC.
Not sure what happens if full 12 volts is applied to an oem choke designed for low voltage. Aftermarket chokes seem to use full 12 volts, so be sure with what you got before changing stuff!
Theory is that the choke is only powered if the engine is running. This way if the ignition is left on, the choke isn't doing anything and the engine will start properly.
Some fords use the electric off the alternator stator which puts out 7-10 volts AC.
Not sure what happens if full 12 volts is applied to an oem choke designed for low voltage. Aftermarket chokes seem to use full 12 volts, so be sure with what you got before changing stuff!
Theory is that the choke is only powered if the engine is running. This way if the ignition is left on, the choke isn't doing anything and the engine will start properly.
Thread Starter
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Cargo Master
Joined: May 2009
Posts: 2,587
Likes: 47
From: Eagle River, AK
Thanks, great advise both of you.
My carb is an aftermarket one and the instructions state 12v choke, I just figured I'd try the stator wire because it worked for others.
I won't have much time at all to work on the truck today, due to domestic duties...
Does anyone know which wire is live with a full 12v only when the engine is running?
My carb is an aftermarket one and the instructions state 12v choke, I just figured I'd try the stator wire because it worked for others.
I won't have much time at all to work on the truck today, due to domestic duties...
Does anyone know which wire is live with a full 12v only when the engine is running?
Elder User
Joined: Sep 2014
Posts: 862
Likes: 7
From: like subarctic, brrr man!
Ah, that makes sense now.
I've heard of people using an oil pressure switch to apply power when the engine is running. But as far as I know, there isn't any circuit or wire that is on when the engine is running.
edit: I found these: http://www.colehersee.com/home/grid/cat/227/
I've heard of people using an oil pressure switch to apply power when the engine is running. But as far as I know, there isn't any circuit or wire that is on when the engine is running.
edit: I found these: http://www.colehersee.com/home/grid/cat/227/
Last edited by ZarK-eh; Mar 29, 2015 at 12:48 PM. Reason: add url for electric choke thingies
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