125,000 miles tune up

A tune up consists of replacing the spark plugs and maybe the spark plug wires. Change the air filter too. No need to do timing. It is controlled by the cars computer. Spark plugs should last for about 100,000 miles. Air filters vary on how long they last. Check the air filter at 25,000 miles. Replace it no longer than 50,000 miles. Your car should not need a tune up for a couple more years or so.

These are not good for much better than that in town. You could try a fuel system cleaner. (BG 44k)

The most common cause for loss of mileage is the engine not being properly tuned. Resrtricted air filter, spark plugs, dirty injectors, dirty egr valve, fuel filter, under inflated tires. These are the basics....I hope this helps.

REPLACE FUEL FILTER.CLEAN FUEL INJECTORS AND FILL TANK UP WITH NEW GASOLINE.REPLACE SPARK PLUGS AND WIRES,CHANGE AIR FILTER, DO THIS LITTLE TUNE UP AND SEE IF IT HELPS YOUR POWER.

check the antithef alarm wth the kye lock and unlock the driver door,if got beeper unlock.and try start the car.

There are several issues that can cause poor gas mileage. I suggest you perform ( or have performed) a tune up. Filters, Fluids, Spark Plugs, Wires, Belts, etc.. & see if that improves your fuel economy...

New spark plugs, oil and oil filter, transmission flush and fill, fuel filter, air filter, coolant flush and fill, clean throttle body plate and bore, clean the MAF sensor, replace any loose or cracked vacuum lines, PCV valve, new air filter, new battery.

99% of the time all you should ever need for a tune up is new spark plugs, and a clean air filter and throttle body. But since your inquiry indicated "major" I gave it more critical thought.

Have a complete tune up performed , includes spark plugs , wires cap and rotor. Change air filter element and have a fuel induction service performed as well.

64 miles is terrible.
Spark plugs, synthetic oil, lighter wheels, timing tune...and anything else you can imagine that would reduce friction, weight, and resistance to airflow.

Usually a Major Tune Up would include

• Replacement of spark plugs & spark plug wires.
• Replacement of distributor cap, distributor rotor, fuel filter & air filter.
• Inspection of the fuel system, emission system & ignition system.
• Adjustment of the dwell, timing, & fuel mixture to OE specs.

Cost to perform all these at a shop will vary greatly, to DIY probably around a couple hundred dollars.