Well, My problem is not the vacuum its the idle speed motor. Do these things have a failure history. Mine no longer hums when it should or always did in the past and my idle no longer works at all. When I start it up it will run if I give it some gas and keep it running that way, if I let it drop back to idle it will just die, makes no attempt to run. The idle switch is working and I have voltage on the motor plug but the motor does not turn, nor have that little hum it had when all was working. John, Martin, David, what do I check next? Is it time for a new idle speed motor? Thanks for any input. Jerry Harry Vin# 4890 PS: John, your tank fix works great and was easy to install. Thanks again.