This was heard on the CBS tv show “The Greatest #AtHome Videos”. Cedric the Entertainer teamed with Kristen Chenoweth to surprise a group of young performers. One of the performers uttered this nice malaphor. You can hear it here: https://www.facebook.com/watch/?v=785249305547779
It is a mashup of “pull out all the stops” (to do someting with maximum effort or ability) and “pull the strings” (to be in control of events or some other people’s actions). “Pulled on our heart strings” might also be in the mix. “Pull” is the common denominator here, and “strings” and “stops” are also similar sounding words, adding to the confusion. A big thanks to Lou Pugliese who heard this one and passed it on.