Why does car stall after releasing the gas pedal on 1997 Toyota Corolla

1997 Corolla will start as long as i have my foot on the gas,but once I release the gas it cuts off.

Asked by for the 1997 Toyota Corolla
Sounds like there's a problem with the idle system. There's generally a valve that controls the idle speed and I would have a shop check this valve out along with the rest of the fuel injection system.
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