Slow in progress (motor regulating)

I would like to know if someone can help me:
I have a Ford Escort Model 99. The circulation car works well, but when you brake in a traffic light, that is, it goes to zero and is regulating the engine, sometimes it produces a fault that decreases rebellations to zero and stops the engine.
He took it to the mechanic and cleaned the Relay Valve (slow march), but it follows me with the same failure.
Will this valve change? Or is it another problem?
Thank you very much.-

Clean the chapter of the acceleration body it may be that it is dirty or see if it has crushed or broken air hose there is one that is always broken or crushed that it is under the suction collector. Greetings Alfredo.-

Thanks, I'm going to verify.

If everything is fine, check the air flow sensor from the filter to the engine

Do not forget so well if the motor valves are in poor condition. The regulation in low will be so tmb the spark plugs must be original greetings