I've noticed a few people 'blip' their throttle as they go to turn off their car. I always thought this was bad for the engine as it lets fuel sit in the motor while the car is shut off. Am i wrong? Does it make a difference if it is carbed or fuel injected? I ask because I did it to mine once (4 barrel carb V8) and it was way easier to start it a few hours later... Any opinions?