Thanks Ray;
but the humm is actually some where in the engine. I am starting to feel an association with roughness in the gas pedal while it happens. Think of it as if you have an imbalance in the intake air that makes everything slightly rougher. Could it be intake related? I have shifted to neutral while its happening at slow speeds and it did not seem to change . I know it's tough to find out like that , If I find anything worth mentioning, I will let you guys know. I can almost certainly relate it to the speed range between 20-40 mph.
