What do you do when diesel was poured in the air intake?
Diesel, being a liquid, is non-compressible, and since a diesel
engine needs to compress air for (adiabatic) ignition, it won't be
able to compress it, so it will jam the engine. Unlike gasoline, it
will take a long time for the diesel inside to evaporate, so the
vehicle is stuck until you fix it. This can be remedied on most
diesel engines by arduously loosening or removing the injectors and
then draining by suction or by cranking the engine until enough is
squirted out to allow the engine to turn over.