vacuum hoses connected to fuel injectors?!?

[ViPER1313]

Filter to TB should not be vacuum unless the filter is a restriction. and despite what K+N wants us to believe, for 99.9% of cars in their normal operating range, it isn't. The size of the hose was also suspect, it is definitely feeding air to the injectors.

How is this? In the picture below you can see a tube run from the bottom right of the front valve cover to the intake tube between the airbox / throttle body. It is used to suck crankcase fumes from the block back into the intake for emissions purposes. I imagine that even though the airbox / filter doesn't introduce much restriction, it does introduce a little, and that is enough to create vacuum (minimal, minimal vacuum.)