Pontiac 2002 Firebird Owner's Manual page 90

When starting your engine in very cold weather
(below 0 _ F or 18 _ C), do this:
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1. With your foot off the accelerator pedal, turn the
ignition key to START and hold it there up to
15 seconds. When the engine starts, let go of the key.
2. If your engine still won't start (or starts but then
stops), it could be flooded with too much gasoline.
Try pushing your accelerator pedal all the way to
the floor and holding it there as you hold the key in
START for about three seconds. When the engine
starts, let go of the key and accelerator. If the vehicle
starts briefly but then stops again, do the same
thing, but this time keep the pedal down for five
or six seconds. This clears the extra gasoline from
the engine.
NOTICE:
Your engine is designed to work with the
electronics in your vehicle. If you add electrical
parts or accessories, you could change the way
the engine operates. Before adding electrical
equipment, check with your dealer. If you don't,
your engine might not perform properly.
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Engine Coolant Heater (Canada Only)
In very cold weather, 0 _ F (
the engine coolant heater can help. You'll get easier
starting and better fuel economy during engine
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warm up. Usually, the coolant heater should be
plugged in a minimum of four hours prior to starting
your vehicle. At temperatures above 32 _ F (0 _ C),
use of the coolant heater is not required.
18 _ C) or colder,
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