But seriously, I had an 86 Cavalier Z-24 that did just that...would stall out, and I couldn't keep an idle without keeping my foot on the pedal.

Air mass sensor...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car