I sprayed WD-40 around the carb and the intake manifold looking for a vacuum leak. Did not find one,
Unless you're using a very old can of WD-40, it's no longer combustible, they took the Propane propellent out years ago. The old cans advertised it could be used as starting fluid...new cans don't say that. You might want to redo that test using an un-lit small hand held Propane touch.
Mike B
