Not sure on your location, with a torch to heat up the bung they always come out, but if they're stuck to lean they'll set a code thats why I mentioned the check engine light.
Im not sure how the car would adjust the fuel if it didnt have a regulator, even single line systems like the ford focus have a regulator that tells the pump how much to pump. coby will hopefully chime in on that bit.
2009 Ford Escape Limited - 3.0L, 6 speed auto, 4x4, 25/33 city/hwy imp mpg.
2017 F150 XLT-XTR - 5.0L, 4x4, 3.55's, E-locker, xtr chrome package, fx4 off-road package.
20/25 imp mpg