![2003 mitsubishi eclipse ecu gs tune up 2003 mitsubishi eclipse ecu gs tune up](https://i.ebayimg.com/images/g/Q4oAAOSwJmJe3ZGq/s-l640.jpg)
Step12 Replace the PCV (positive crankcase ventilation) valve. Step11 Service the battery, adding distilled water (if required), cleaning terminals and cable ends. Step10 Adjust the clutch, if you have a manual transmission (although some cars now sport self-adjusting clutches). Step9 Replace the air filter, which should be changed between major services-every 15,000 miles-as well. Change the oil and oil filter if it's been 3,000 miles since the last oil change. Step8 Check the fluids under the hood and replenish as necessary. Be sure to replace the valve-cover gasket as well, especially if you see oil on top of your engine. Step6 Adjust the valves as needed (unless your car has hydraulic valves). Step5 Check the ignition timing and adjust as needed (rare for a car with electronic ignition-post-1980-and some cars don't allow this at all). You'll actually want your points changed, or at least adjusted, every six months or so (if they're changed, check the ignition timing as well). Step4 Change the points and condenser if you have an older car (roughly 1978 or older) that doesn't feature electronic ignition. Step3 Replace the distributor cap and rotor if your car has them (some newer models with distributor-less ignition don't).
![2003 mitsubishi eclipse ecu gs tune up 2003 mitsubishi eclipse ecu gs tune up](https://i.pinimg.com/originals/01/31/06/01310670853dd920ec6876bf3d410295.jpg)
They may be permanently attached to the distributor cap, so it will have to be changed as well. A new set of high-quality wires is worth the cost. Also examine the spark plug wires and replace as needed. Step2 Change the spark plugs (unless they're platinum, in which case you have 30,000 more miles to go). If you have a fuel-injection system, regular cleaning isn't necessary unless the injectors are clogged. this will lead you through the vitals and secondary tune up sections that will ensure optimal performance. OK, i have put a step by step check list for you to follow. SOURCE: I am trying to do a tune up on my own on a 2000