Here are the things you will need to do as you tune your own car, as well as an explanation why it is strongly recommended.
1.
Fuel Filter- You will want to replace your fuel filter. Dirty fuel
filters can lead to difficulty starting the car, can restrict the
engine, and cause the car to lose power.
2. Sparkplugs and
sparkplug wires- you will want to replace these, as bad plugs can rob
your car of fuel efficiency and even take away from drivability. Bad
spark plugs can even cause breakdowns, meaning an expensive tow. Bad
wires can also cause problems.
3.
Distributor cap and rotor- these two parts are usually made of plastic,
therefore they deteriorate with age and use and cracks may develop,
allowing moisture in. Because of this, metal contacts on both can
corrode, which causes misfiring.
4. Valves- you will want to check
and adjust your valves as needed. Also, you will want to replace the
valve-cover gasket, especially when you see oil on the top of your
engine.
5. Belts- you will want to check all of your belts to make
sure that they are not worn. If they show signs of extreme wear and
tear (fraying, tension) you can replace those as well.
6. Air
filter- A dirty air filter blocks airflow to the engine, making it work
harder. This results in a decline in horsepower and fuel economy.
7.
Fluids- check all of your fluid levels underneath the hood. If any
appear to be thirsty, give them what they need. (Transmission, brake,
etc.)
8. Battery- give your battery a cleaning. (see our article on this process)
9.
PCV (Positive Crankcase Ventilation)- this should be replaced because a
clogged breather filter prevents the PCV from siphoning the blow-by
gases and moisture created by engine combustion. This results in oil
breakdown and sludge buildup.
