Holley 1920 Idle Speed

1970Dart198 said

Thanks. And how would I go about doing that? Buy a new Choke stove? I have a bimetal spring/coil that connects to the exhaust manifold then carb.

Also, for a 1970 I have a 195 degree thermostat in my car, should I change it to a 180? Maybe the fuel is percolating in the carb and stalling it out?

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You don't need a new one if yours is working.

remove the choke stove, there are two bolts.

Look underneath it at the bimetallic spring. There should be marks where you can loosen it and richen or lean it out. Go two notches at a time and then drive it a while and see how it performs.

Keep in mind that the choke only works when the engine is stone cold (at least for adjusting it). You should have it parked for 2-3 hours at a time before you evaluate if your adjustments helped or not. Warm starts do not count. The best time to evaluate the choke is first start in the morning after sitting all night.

So you may want to drive it a few days or so before making more adjustments.

You can keep adjusting the choke thermostat spring so it will run a little richer. Remove it and look underneath. Be careful not to loose any screws or clips..