Can papillary muscle dysfunction be present with only a faint murmur, but no symptoms at all, no prior heart attack, normal echo & ekg?

If the echo is: Normal there really is no papillary muscle dysfunction.

Confusing question: Papillary muscle dysfunction is diagnosed by echo. Therefore one cannot have a normal echo if they have papillary muscle dysfunction. Murmur is present when there is a valvular disease, but faint murmurs may be present with insignificant valvular disease. Such questions as you are asking can be confusing to both patients and the doctors. Ask your doctor to answer these questions for you.

Possibly not likely: Most common cause is left ventricular ischemia/infarction is always associated with an apical loud systolic murmur. Murmur can be variable depending on severity of the condition. Other causes are ventricular dilatation like in severe cardiomiopathy, inflammatory disease and interventricularconduction abnormalities. In theory murmur may not be present and ekg nl. 2d echo should show regurgitation.