Toyota Repair: car stalling, air control valve, toyota camry

Question
I have a 1998 toyota camry xle 4 cynlinder,  197,000 miles.  since the weather is warming up it has been stalling at lights,  acting like its vapor locking.  won't start right back up when it stalls out.  Pepboys put it on the diagnostic and could not find a problem with it.  Feel a choke (feels like this) in the back end when driving sometimes.  Have not had major work done to this car besides maintence repairs.  She is a good car  help :)

Answer
Most stalling problems are caused by a sticking idle air control valve so I recommend doing the following: The throttle body should be removed from the intake, the idle air control valve removed from the throttle body then the IAC valve should be cleaned using air intake cleaner and a brush, the same for the inside of the throttle body, removing all of the gum and carbon deposits form both should cure the stalling problem.