Join Date: Jul 2007
Car: FJ1100 STREET FIGHTER
As said, undo the air-box and give it a 5 second burst up the air-intake, put the can to one side and immediately attempt to start the engine, before it evaporates out of the system. Do not use while someone else is cranking the engine as a blow back could ignite the can. I use butane which is equally potentially dangerous.
Why would it work?....... when the ignition system is damp, the spark is often weak, this mixture catches easier, it's as simple as that. Then as the starter motor is no longer cranking, more current goes to the ignition system and it's able to ignite with the normal petrol/air mixture.