Preface: There’s a story of someone who had been instructed to stuff a rag into their tailpipe either fully blocking or partially blocking their tailpipe to prevent the vehicle from stalling / sputtering. This was a late 1996 Saturn vehicle. To keep things relevant to this site, I will say this backstory may be true or false.
Question: From the mechanical perspective of a vehicle, is there any logical reason where restricting the airflow of your tailpipe with an object (i.e. a rag stuffed in it) would somehow prevent your engine from stalling / sputtering or somehow keep an older vehicle running? Possibly due to changes in airflow?