My 96 Camry starts first time every time then stalls after 10-20 seconds? Last year it ran fine but rarely would stall @ running speed. I had to set for 2-3min before it would start then it ran fine. If I tried to start it immediately it started then stalled within 2-5 seconds. Ran for months without issue now won't stay started @ all. Local mechanic replaced throttle position sensor (with used one) and the igniter? Checked fuel pump, OK!
closed as too broad by Zaid, DucatiKiller, vini_i, Fred Wilson, Pᴀᴜʟsᴛᴇʀ2♦ Dec 20 '15 at 3:40
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I take it that your mechanic hass scanned the vehicle and found no faults. These sort of problems can point to the transpnder in your car key, or the transponder in the steering coluum or its wiring. At the very worst case your engines ECU immobiliser may be on the way out.
If a vehicle starts but then the engine stops very soon after that, chances are that the alternator is dead as the battery without the alternator has only so much charge to sustain the motion for a brief while.