Engine Surge While Stopping

krazykuda: I agree.

Upon further investigation: my Edelbrock 1406 Carb is definately not closing it's secondaries. They are staying open about 30-45 degrees.

What could be causing this?

The gas and air going into it has been very clean since it was installed in 2008-2009 (replaced the fuel tank once; air filter, and fuel filter, often).