So I bought a brand new holley 670 Truck avenger,
I runs good but...
when i start a cold engine should it rev to around 1200 for a minute or so and then settle to 650?
I think that it should, but it I have to keep it runnung, by pumping the accelerator.
Its on a ford 351W with a t-176 . the choke wire is a iggnition controlled 12 volts.
what is out of adjustment? how do i fix it? I think it has to do with the high idle, and the and the choke, but i am not sure what to do with that.
It sounds to me like you have a stuck float in one of the two bowls.
If that's the case, you can try to tap on the bowls lightly with a wrench and hopefully it'll become un-stuck.
Or you'll have to remove the bowls and do a visual inspection and correct. Even though your carb is brand new, I find it best to have some new bowl gaskets on hand, as they sometimes tear when the bowl is pulled off the carb. And when you remove the bowls you need to be very careful that the needles are re-installed correctly.
Stuck float seems less likely to me on these carbs, possible I guess, but not likely. Remember, externally adjustable floats are one of the major benefits of this carb, so no need to take the bowls off; just remove the sight plugs and see where the fuel level sits.
I guess I forgot to ask the obvious first, but did you turn the idle stop up? It's the screw on the throttle linkage side of the carb.
The choke on mine works perfect if I don't gun it while initial fire up. So if you have the electric choke, take off the air cleaner, have someone pump it once while cold, turn the key, and you verify if the choke is working right. If not, the choke is stuck and just needs to be cleaned or oiled.