When the gas pedal is let off the car stalls

Hello,

This sounds like one of two problems can be happening either you have a vacuum leak or the IAC motor is dirty and needs to be cleaned.

Here are three guides to help us get the problem fixed

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

and

https://www.2carpros.com/articles/stall-at-idle

Please run down these guides and diagrams and report back

Cheers, Ken