I had a stalling problem in my 95 Camry. I took it to 2 mechanics. They replaced everything : sensors, valves, and everything that had to do with the electronics. My main complaint: When cold, started fine, after driving didnt start, very low idle and stalling.
The first 2 mechanics admitted, they didnt know how to fix the problem. I knew I had to take it to the Dealer. The Dealer fixed it. Its been running great for the last 4 months.
Okay: this is what the Toyota tech told me: the cable the runs from the gas pedal to the engine had so much crap in it, it was sticking. So, when the car wasnt used for awhile, all the stuff that is controled by this cable was allowed to return to home position. When driving, the ttrottle linkage didnt snap back fast enough. I dont really know much about cars, but I knew enough to think he was full of shit. I made him show me what he did.
He cleaned the housing for the cable, the cables leading to anything that handles fuel and anything that looked crappy.
Maybe he got lucky, but all I know is : no more stall