[TR] erratic carburator idle

[Rochlin Robert]

	I’ve been working through, what I think is, a carburetor problem. My 72’ TR6 has a rebuilt engine with a Goodparts mild cam and compression of about 9:1. Then I start from cold the engine runs really well, but after it is throughly warmed up it gets finicky.  When I idle for a long period of time the idle will gradually decay.  Also if I stop, the engine will start right up, but idle at a very low RPM.  This poor idle improves as the engine is rum for a while. On one hand is sounds like vapor lock or at least heat effecting the carburetors, but the weather here is not hot yet and the engine seems to exhibit this behavior when the ambient temperature is in the 60’s F.   My knee jerk reaction is that I should add a carburetor heat shield, but before I did that I wanted two ask if anyone else has had this difficulty or may suggest something I’m missing. 
   Thanks in advance.
	Bob