why car would stall after its warmed up on 1999 Oldsmobile Alero

90k car starts and drives good car stalls after its warmed up about 10 min it just dies while driving never stalls in idle car usually starts right back up or will after 5 min. No check engine light

Asked by for the 1999 Oldsmobile Alero
egr valve i would go to salvage yard got one for 5 bucks no more problems