I have a 347 with new IDAs from Pierce Manifolds. The carbs were jetted and syncronized on the dyno. Ran like a champ. Now that the motor is in the car is runs excessively rich at idle (All plugs are wet with fuel) Ignition is good and the motor idles with backfire in the exhaust.
I checked the fuel system (Carter pump, -6 AN lines, return line, 2.5lbs pressure) and all seems OK. I pulled the fuel supply line and started the car with existing fuel in the bowls. Car ran the same (wet plugs)
I've not touched any of the carb settings since the dyno. They were taken off the motor when it was installed. It's almost as if the primary circuit is open at idle. Any thoughts as to what I should look at?
