You'd know if the diaphragm was torn, but that's about it. If it WAS torn, however, you'd be sucking gas into your intake and it would be hard for that to escape notice.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition