Volvo Repair: 2005 S40 (not turbo) engine problems, dashboard lights, volvo dealer

Question
At 37,500 miles, after driving for one minute, the car will accelerate and stall. The dashboard lights will come on as the car stalls. The oil light stays on as the car glides. When idling, the car will accelerate on its own, as if the engine is too rich or lean in fuel mixture. When trying to start the engine after this happens, the engine seems like it takes it a few more seconds to ignite, or as if it is not getting enough fuel. This is second time it has happened in 3 months. The dealer said nothing was wrong with it the first time. Any idea?

Answer
there is something wrong  if it keeps happening you have to take to Volvo dealer again check if you get any fault codes that can point the problem i cant tell what problem you have until you have some fault codes  and if you don't have foult codes either you have to drive the car until the problem is happening all time or let dealer mechanic drive the car for couple days