Bad Carb Or Timing Problem

[ChevLoRay]

I have the 1901 Edelbrock Q-Jet, rated at 750CFM. I, too, am running the stock block and stock compression ratio. Q-Jets are misunderstood by many people. It's not a bad carburetor. Carburetors, in general, have been fingered as the culprit in many cases in which they were not to blame. I have made money rebuilding them because someone else said it needed to be overhauled.

One problem that they have, is leaking fuel from the float bowl, via the plugs in the bottom of the body of the carb, but visible after you remove the throttle plate off of the bottom of the carb. If those plugs are leaking, you'll be getting fuel in the intake, via the leak. That fuel, combined with a lean condition in the engine AND with a "hot spot" in the combustion chamber, COULD cause the run-on condition. This problem will also be shown to cause bad gas mileage and flooding. There are repair parts available that don't require a rebuild.