Carburetor Idle Stop Solenoid Configuration

340inabbody said

I may not. It’s a bit complicated but as you may or may not know, I’m using the progression programmable distributor. And it’s made a world of difference. I am able to get fine point tuning that I could never get with a regular distributor that I needed. In any event, I’m having some slight dieseling while also and also some hard starting. I can probably tune for it, which is what I’m trying to do right now.
I could explain what I’m doing with the distributor, but it’s fairly long. But essentially I am able to have a smoother transition from park to in gear. So the difference in and out of gear is like 200 RPM. I just might need to back off some timing at the low end.

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Got it. If it’s pump gas there are other things you can do to stop run on.

If your CR is between 10-11:1 you can use a 180 thermostat. Sometimes just a 10 degree or so temperature drop can eliminate or at least reduce it some so other measures can get rid of it.


I’ve also used a standard reach plug before to get the tip of the plug closer to the cooler chamber wall. You might need 1-2 degrees more timing.

One range colder plug can help. That’s only if the plug you have is on the warm side.

Edit: you have a 200 rpm drop going into gear which is real nice. What is your idle rpm? Sometimes a 75-100 rpm reduction at idle can help that too.

You might need to use a combination of those things to clean that up.