wildstar

The car has always stalled out until warmed up and won't idle when cold, unless I give it some gas. It has a Holley 600 with an electric assist choke. I'm thinking that the choke might be out of adjustment (see below). Holley recommends adjusting it one notch at a time, allowing the car to cool down after each adjustment.... until it is properly set. Given how far to the right mine is, would it make sense to start back at the twelve o'clock position and go from there?

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SouthSide2

Yes it all would make sense if the thing was connected and heating up/working?

DanzigEx

Hey Wildstar,
First do what SouthSide2 suggested, check to make sure you are getting power to the choke.
Once you are, set the choke cap to the 12'o clock mark as a starting point (we'll adjust this later)

Next you'll want to adjust the Fast idle screw till your engine starts at 1500 RPMS, I'll just copy and paste how to do it from the Holley site. . .
a) Turn the engine off and let it cool until the choke is fully closed.

b) With the engine off, turn the throttle to its side wide open position and hold it there. This will expose the fast idle set screw behind the choke housing.

c) Using a ¼ inch open-ended wrench, turn the screw clockwise to increase the RPM or counter clockwise to decrease to RPM.
d) Close the throttle and restart the engine and check the RPM. ( You'll make small adjustments here, turning the screw a lot will just cause more issues)

e) Adjust as many times as needed until the engine idles well from a cold start until it is completely warmed up.

f) Double check to make sure the idle adjustment screw isn’t rubbing or making contact with the intake manifold just below the carburetor base. Correct this clearance if needed.

Once you have the fast idle set to 1500 RPMS you're ready to start messing with the choke timing.
The choke timing is related to temperature:
The hotter the weather, the more you'll turn the choke cap clockwise ( don't go past the last marking)
The colder the weather, the more you'll turn the choke cap counter-clockwise ( don't go past the last marking)

Once you've set the choke timing, write down the index and the current temperature so you can reuse that setting when you change the settings
REMEMBER You will need to adjust the choke timing seasonally, if not you'll have issues when it gets colder, or low gas mileage when it gets hotter.

Once your choke is set correctly, you should be able to get in, activate fast idle with the gas pedal ( One full pedal sometimes less or more), start it and drive off cold without it stalling. I know because I can!

Happy driving!

mmadden55

What he said.