Which of these steps did you miss?
From the flight manual:
Flap handle – UP.
Carburetor ram air control – forward in RAM AIR position (unless FILTERED AIR required).
Carburetor hot air control – forward to NORMAL position (unless HOT AIR required).
Trim tabs
o Rudder trim: 6° right.
o Aileron trim: 0°.
o Elevator trim: 0° if fuselage tank is filled with less than 25 gallons of fuel; 2 - 4° nose heavy if the fuselage tank is filled with more than 25 gallons of fuel.
Mixture control – IDLE CUT-OFF.
Propeller control – full forward to INCREASE.
Throttle –open 1 inch.
Parking brakes – set. Don’t try to hold the aircraft with foot brakes.
Supercharger – AUTO (set by default).
Fuel shut-off valve – ON.
Fuel selector valve – set to left wing tank.
Fuel booster – ON.
Battery and generator switches – ON.
Coolant and oil radiator flap control switches – operate manually from CLOSE to OPEN and check by listening to determine whether the doors are operating. Maintain both flap doors fully OPEN while running the engine on the ground (flap doors will be set to Automatic for takeoff).
Prime the engine three to four seconds if it is cold, one if warm.
Raise the starter switch cover and hold the switch up in the START position to operate the starter and begin turning the engine ([Home] key).
After six propeller blades have rotated passed the canopy, set the Ignition switch to BOTH while continuing to operate the starter.
As the engine starts, move the mixture control to RUN and release the starter switch.
If the engine fails to take hold after several revolutions, give it one second’s more prime.
Check that oil pressure reaches at least 50 PSI within 30 seconds. If it doesn’t, stop the engine.
Idle at about 1200-1300 RPM until the oil temperature reaches 40°C and the oil pressure is steady.
Check the suction gauge to show between 3.75 to 4.25” of vacuum pressure.
Check all of the engine instruments. Make sure they don’t exceed or fall below their limits.
After the engine is warmed up, idle at 1000 RPM or slightly less. This keeps the engine clean but not too hot.