Honda Prelude 1990 Online Reference Owner's Manual page 62

Starting the Engine (cont'd)
Starting a Warm Engine (2.0 S)
Start it without pushing the accelerator down. If it won't start, push
the accelerator pedal about halfway and hold it there while cranking
the engine until it starts. It may take 20 to 30 seconds of cranking.
DO NOT pump the accelerator.
Once the engine starts, release the accelerator gradually as the
engine speeds up.
Starting the Engine (2.0 Si,Si)
NOTE:
When starting in cold weather, keep all unnecessary electrical
circuits off (lights, defogger, etc.) for the best battery output.
Do not crank the engine for more than 15 seconds at a time. Wait
10 seconds before going to the next step.
1. With YOUR FOOT OFF THE ACCELERATOR start the engine by
turning the key to the III position.
2. If the engine won't start within 15 seconds or starts but fails to
continue to run, push the accelerator pedal halfway, and hold it
there while cranking the engine. Once the engine starts, release
the accelerator gradually as the engine speeds up.
3. If it doesn't start within 15 seconds, push the accelerator pedal
down to the floor and hold it there while cranking in order to clear
flooding. Try step 2 again.
Cold Weather at High Altitude Starting (2.0 Si,Si)
NOTE:
When starting in cold weather, keep all unnecessary electrical
circuits off (lights, defogger, etc.) for the best battery output.
Do not crank the engine for more than 15 seconds at a time. Wait
10 seconds before going to the next step.
1. When starting in cold weather at high altitude (above 8,000 feet),
push the accelerator pedal about halfway and hold it there while
cranking the engine. Once the engine starts, release the
accelerator gradually as the engine speeds up.
2. If it doesn't start within 15 seconds, push the accelerator pedal
down to the floor and hold it there while cranking in order to clear
flooding. Try step 1 again.
NOTE:
If the outside temperature is below freezing, or if your car has not
been driven for several days, warm up the engine for a few minutes
before driving.