TR6 will not idle

["Robert Snyder" <RJSNYDERCPA@classic.msn.com>]

I have a '70 TR6 which has been fitted with Weber DGV carburettors in the past 
year.  Car has run great with no problems.  This past Saturday, the car will 
not idle.  It actually slowly tries to shut itself off.  I checked for vacuum 
leaks but everything is tight.  The car still runs great at speed, but when at 
stop light, will shut off.  Any ideas?  Thanks.

Bob Snyder
'70 TR6
'79 Spitfire