Okay..as usual, the "whine" came back!!! The engine shows no slow starting, no long cranking...no impact on performance, acceleration, etc...can't really tell MPG because it hasn't been that long. When the car starts, it takes a few seconds for the noise to show up, and when you accelerate it really dies down in volume. It is there about 90% of the time. I had done a Seafoam treatment several weeks ago...and I'm still not convinced that is the culprit,
The car is a 4.7HO with only 83K on it. The noise definitely is coming from the fuel pump area and not the filter, but from what I've read here a blockage in the filter area could cause a pressure backup to the pump to make it whine. I'm just trying to make sure which to change (Filter or pump)???? My pro mech friend says it's the pump and if I had some filter blockage it would show up in performance...and I'm inclined to agree...
Pump or Filter???