tuning your engine from how long it takes to die when you pinch the fuel line is (maybe not) so innaccurate you may as well just turn the needles about every five minutes but tuning should be done on sound smoke level performance and heat. if you LOL @ MK999 remark was at the brake pulling then the reason for this is it also pushes the throttle in a bit slowing down, however this is not neccessary and it idling for a few seconds is fine.

OK maybe this was going too far but so was your remark