How do i know if i need a tune up? - 2002 Chevrolet Malibu

Usually @ 50-60,000. New air filter, Gas filter, Plugs and wires.......If car starts running rough or hard to start and miss fire is a good sign of a tune up needed..............Hope this helps.

The tell tale signs of an engine out of tune are.Check engine light flashing, Car has poor gas mileage, engine is hard to start > more so when it is cold outside, Rough idle, engine stumbles on take off. Since the invention of platinum spark plugs automotive manufacturers reccomendations for replacement of tune up parts are less frequent than the old days. On the average cars require tune ups every 60,000 miles. This does not include the air or fuel filter which should be changed at least once a year or every 20,000 miles.