I'm going to show you a common scam that
mechanics pull on their customers see
all these rubber hoses they're vacuum
lines they take intake vacuum pressure
from the engine it's a sealed system
with vacuum pressure that sucks in so if
a mechanic pulls under here takes out
one of the little hoses it'll suck here
and run poorly it can make your check
engine light come on because the engine
will be running too lean it has too much
air that it's sucking in and not enough
fuel it can make your engine idle poly
you can have of acceleration especially
at lower speeds the faster you go that
little leak won't mean that much and it
could run okay at highway speeds so make
sure all the hoses are plugged in and
when it's idling listen for a sucking
sound and when you get there you'll
probably see a hose has been unplugged