Electric Choke - HELP

[PHOENIX]

OK guys I have a 1904 Edelbrock Q-Jet.
Its around 4 years old or so.
Its seems as if the electric choke is sticking or not turning off.
I dont know whats going on.

I had trouble getting my idle speed lower.
I had the idle speed screw all the way out and the idle was still like 900 rpm.
So I figured the choke was still working, even after long warm up.
So I started adjusting the choke idle speed and lowered it down to like 700 rpm from 1000 rpm or so.
I was then able to lower my regular idle speed to 700rpm.
But after a short drive the idle speed returns to 1000 rpm or even up to 1200 rpm.
I unhooked the oil pressure switch near the oil filter awhile back.
Does this have anything to do with the electric choke?
How do I test the electric choke to see if it is working properly.
I have not yet checked if 12v's is being provided to the choke or not.
It used to be that I could start the truck, idle speed would be about 950rpm, I would drive about 2 miles and my idle speed would return to 700 rpm.
Or I could rev it up a little high and the idle speed would go down to 700 rpm.
It was great for cold mornings.
It doesnt get that cold here.
I dont even really need a choke, but I would like to keep it working anyway.

Also when the choke is competely off, is the plate above the primaries (?) straight up and down, or is it like a 45 degree angle.
It seems like it moves from closed (blocked off) to slightly open.
When I move the plate by hand to straight up the idle speed drops to where I want it.
Also when I play with the choke linkage everything is very smooth.
Nothing is binding, getting gunked up, sticking, etc. Smooth as can be.

Does that oil pressure switch above the oil filter have anything to do with the electric choke?
Anyone have an idea of what my problem is?
What should I check?

Thanks