Hi Claude:
I think your problem may have been the vacuum hose not being hooked up. When you rehooked up the vacuum tank, the vacuum was closed off, thus fixing your problem.
Happy trails ahead.

Gord

Where Are You From? Guelph, Ontario, Canada

Do You own a car built by Durant? 1932 Frontenac built by Dominion Motors Limited, Toronto

Hello Bill,

Thank you for your kind advise. I tried the WD-40 approach as well as an unlit propane torch, but no rpm change. So I left the car in the garage for a few weeks and decided to reconnect the vacuum pump this morning. Well guess what! The engine runs as smooth as if nothing ever happened. Problem solved... mystery unsolved.

Thank you for the kind advise.

Claude Lavoie