That's an... interesting question!
Unfortunately, it's not possible for a poop to propel a car. Poop is a biological waste product that doesn't have the physical properties or energy density to generate the force and motion needed to move a vehicle.
Cars require a significant amount of energy to move, typically provided by fuels like gasoline, diesel, or electricity. The energy released from burning these fuels is what propels the car forward. Poop, on the other hand, is primarily composed of water, organic matter, and microorganisms, which don't have the capacity to generate the necessary energy or thrust to move a car.
Additionally,