Oh, so it only does that when the car is cold? It really sounds like a vacuum leak because when you stomp on the throttle, the manifold pressure increases to near atmospheric pressure and therefore can produce no vacuum for accessories to run on. If the system looses vacuum, the system will turn off. It's got to be something simple. ----- Original Message ----- From: "Mark Blitman" <fedsales@xxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Thursday, November 06, 2003 6:39 PM Subject: Re: IML: Auto Temp II buzzing...... Brad..i have tried this to no avail..anyhow it works normally after about 20-30 minutes..weird,huh? its a '74 imperial..