Jonathan -
I would suggest that the butterfly plates were not sealed properly against
the throat body, and thus are cocked open. Alternatively, you can check to
make sure the throttles are aligned properly first before taking the carb
off the car by loosening the shaft connector and see if that brings the
idle down.
More fuel usually means slower worse idle. More air usually means faster
idle, so you are getting too much air somewhere.
Alan
On Fri, Dec 7, 2012 at 7:30 AM, Jonathan Quandt <JFAQuandt@comcast.net>wrote:
> I recently had my h6 carbs on my 56 bn2 rebuilt and I am having trouble
> with very high idle (like almost full throttle) when I start the motor.
> There is no fuel exiting the float overflows and they are unobstructed. The
> butterfly valves appear to be functioning smoothly . The motor flooded
> badly when using choke and would not start but using no choke the motor
> starts right up but the rpms roar to 3000 or more. The fuel pump was
> replaced with one producing 4lb pressure. Could the pump be delivering too
> much fuel pressure and causing this problem. The jet needles are Qw
> standard,could they be miss matched to the jets causing too much fuel to
> enter manifold? are the butterfly valves not properly seated? Or perhaps
> all of the above. Again this is not just a little fast idle but a bunch.
> cheers JQ Ps The good news is that replacing the timing gears seems to
> have fixed the valve timing and I can at least start the little darling.
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