check for vacuum leak or dirty fuel filter
When the gas filter is dirty and when the dirty gas goes to the engine for ingnation the gas will not burn properly thus affect the riding.The mileage becomes lesser.The engine will produce less power.
Yes, especially in Volkswagen cars.
It could possibly
If the filter is to small or dirty this would restrict the air flow, lowering the CFM available.
It will look dirty. Just replace the filter every 30,000 miles.
dirty fuel filter
Very much so. A dirty filter causes restriction in fuel line then which requires more fuel to be pushed through into engine. Also can cause rough idle and sometimes stalling
Yes it does the proper air flow that the engine requires is slowed from a dirty air filter
Many things can cause a car to be sluggish like dirty air filter, check engine light came on, bad transmission, bad engine, etc.
When it is dirty, check at each oil change.