Domestic brands have the most American-made content in the U.S. according to a new index released by American Universityâs Kogod School of Business.
A mechanic can clean or replace spark plugs during a tune up. Most new cars have platinum spark plugs which don't need to be replaced as often as traditional spark plugs. Mechanics can replace a dirty air filter during a tune up. A tune up includes checking and topping off an vehicle's fluids. A tune up is a relatively simple job that some people prefer to do themselves.
beyond the plugs, air filter, cap, rotor, wires and valve adjustment the tune up usually includes other services like brake inspection, transmission fluid change, oil and filter change. those are not responsible for the idle problem but should be done every 30,ooo miles.