ORIGINAL: siclick33
Personally I would be very careful with that technique. As long as you are on the ball it is fine but if you are a bit slow and open the tap a bit late you risk an overtemp.
As Pete says, the ECU shouldn't pump fuel if the gas doesn't raise the temp beyond a pre-set limit. If the gas doesn't light, the fuel shouldn't flow.
And, if you forget to open the fuel shut-off valve before attempting a start, which I've never done [sm=red_smile.gif], immediately abort the start. If you open it after the pump has started the ramp and is now trying even harder to build up pressure, and suddenly release it, you are sure to get flames and an over temp with the sudden dump of fuel.